Skip to main content
Natural Inquirer - Homepage

Free Science Materials for K-12 Students

  • Bookmarks
  • Cart0
  • Account
  • USDA
  • USDA Forest Service logo.
Natural Inquirer - Homepage
  • About
    • About Natural Inquirer
    • Team
    • Partners
    • Press & Past Events
    • Contact Us
  • Resources
    • View All Resources
    • Grade Levels
      • PreK - 2nd Grade
      • Upper Elementary
      • Middle School
      • High School
      • All Grade Levels
    • Resource Types
      • Articles
      • Activities
      • Collector Cards
      • Coloring Pages
      • Videos
      • Lesson Plans
      • Scientists & Collaborators
      • Spotlights
      • Virtual Learning Adventures
      • All Types
    • Resource Topics
      • Wilderness
      • Wildlife
      • Water
      • Active Forest Management
      • Social Science
      • Fire
      • Agriculture
      • Recreation
      • Carbon
      • Insects
      • All Topics
    • Special Collections
      • Artemis Moon Trees
      • Career Exploration
      • Experimental Forests & Ranges
      • Project Learning Tree Connections
      • Globe Connections
      • Designing Your Own Study
      • Smokey Bear
      • Spanish Editions
      • Woodsy Owl
      • Virtual Learning Adventures
      • World's Forests
      • All Special Collections
  • Order Materials
    • View All Products
    • Journals & Monographs
    • Readers
    • Collector Card Packs
    • Coloring Books
  • Educators
    • For Educators
      • Educator Guide
      • Educator Blog
      • Newsletter
    • Classroom Ready Resources
      • Activities
      • Career Exploration
      • Lesson Plans
      • Learning Modules
      • GLOBE Connections
      • Project Learning Tree
    • Get Involved
      • Volunteer Your Classroom
  • Career Exploration
  • Bookmarks
  • Cart
  • Account
  • About
    • About Natural Inquirer
    • Team
    • Partners
    • Press & Past Events
    • Contact
  • Resources
        • View All Resources
        • By Grade
          • PreK - 2nd
          • Upper Elementary
          • Middle School
          • High School
        • By Type
          • Articles
          • Activities
          • Collector Cards
          • Coloring Pages
          • Videos
          • Lesson Plans
          • Learning Modules
          • Journals
          • Monographs
          • Readers
          • Scientists & Collaborators
          • Spotlights
          • Virtual Learning Adventures
          • All Types
        • By Topic
          • Agriculture
          • Active Forest Management
          • Carbon
          • Fire
          • Grasslands
          • Insects
          • Recreation
          • Social Science
          • Water
          • Wilderness
          • Wildlife
          • All Topics
        • Special Collections
          • Artemis Moon Trees
          • Career Exploration
          • Experimental Forests and Ranges
          • GLOBE Connections
          • Project Learning Tree Connections
          • Designing Your Own Study
          • Smokey Bear
          • Spanish Editions
          • Virtual Learning Adventures
          • Woodsy Owl
          • World's Forests
          • All Special Collections
  • Order Materials
        • Download all resources - FREE!

          *Due to recent government funding changes, we currently are only able to process bulk orders of 20 or more. We hope that we will be able to resolve this issue in the near future. In the meantime, please feel free to download our resources and explore the website for many great lesson plans and activities.

          View All Products
        • Journals & Monographs

          Journals focus on a group of related articles, while monographs focus on one research article.

          Journals & Monographs
        • Collector Cards

          Learn about possible career opportunities in science!

          View All Card Packs
        • Readers

          For a PreK-2nd grade audience, each Reader focuses on one Forest Service scientist and their research.

          View All Readers
        • Coloring and Activity Books

          Learn more about science through our coloring and outdoor activity books!

          View All Coloring and Activity Books
  • Educators
        • Overview
          • General Educator Guide
          • PreK-2nd Grade Guide
          • Upper Elementary School Guide
          • Middle and High School Guide
          • Non-Formal Education Guide
        • Classroom Ready Resources
          • Career Exploration
          • Learning Modules
          • Lesson Plans
          • Explore All
        • Order Materials
          • View All Free Products
          • Contact Us
        • For Educators
          • Educator Blog
          • Newsletter
          • Project Learning Tree
        • Get Involved
          • Volunteer Your Classroom
  • Career Exploration

Breadcrumb

  • Home
  • Resources
  • Don’t Judge a Soil by Its Color: Exploring Forest Soil Following a Wildfire
The pdf cover of the 'Don't Judge a Soil' article which features a photo of vegetation burning.
Bookmark
Please login to bookmark Close

Please login to bookmark


Lost your password?

No account yet? Register

Don’t Judge a Soil by Its Color: Exploring Forest Soil Following a Wildfire

  • Article
  • Middle School
  • 1 Classroom Period
  • Active Forest Management
  • Fire
  • Fire Effects
  • Fire Recovery
  • Fungi
  • Invasive Plants
  • Mycorrhiza
  • Native plants
  • Soil
The pdf cover of the 'Don't Judge a Soil' article which features a photo of vegetation burning.
SHARE
  • Copy Link
  • Facebook
  • X (Twitter)
  • Pinterest
  • Email
  • Google Classroom

When a wildfire burns across a forest, logs and stumps on the ground may completely burn up. When this happens the soil beneath and near the logs and stumps is intensely heated. These soils, not surprisingly, are called “red soils” by soil scientists. The scientists in this study wanted to answer two questions: (1) What are the differences, if any, between the growth of nonnative invasive species and the growth of native species in red and black soils following a wildfire? (2) What happens to mycorrhizal fungi following a wildfire?

Don’t Judge a Soil by Its Color: Exploring Forest Soil Following a Wildfire

Jump To

  • Meet the Scientists
  • Thinking About Science
  • Thinking About the Environment
  • Introduction
  • Methods
  • Findings
  • Discussion

Meet the Scientists

Jane E. Smith

Jane E. Smith

Botanist

My most awe-inspiring moment as a scientist came when walking deep into an old-growth forest just a few weeks after a severe wildfire had killed all of the trees. The... Read Full Bio
Cassie Hebel

Cassie Hebel

Soil Scientist

My favorite science experience is studying mycology and learning to identify all types of mushrooms. It is fun to look inside the wonderful kingdom of fungi. From the smallest underground... Read Full Bio

Thinking About Science

To become a research scientist, you must attend college and earn a series of academic degrees. After 4 or more years in college, you could earn a bachelor’s degree. A master’s degree follows, usually after 2 to 3 more years of study. Finally, you may earn a doctoral degree, commonly called a Ph.D. (Ph.D. stands for Doctor of Philosophy).

 

It could take up to 4 more years to earn a Ph.D. For every year of study, a student becomes more expert in a particular area of study. One can become an expert in almost any area—from art to zoology. To earn a masters or doctoral degree, most students must do a research study. For a master’s degree, this study is called a thesis.

 

The research in this study was done by a student earning her master’s degree. The student learned that asking research questions and solving them was fun for her. If you are interested in learning new things, you might discover that you like to ask and solve research questions too!


Thinking About the Environment

Do you ever think about what happens underground? The soil is a world about which we seldom think. It is a busy place, full of microscopic organisms, including bacteria and fungi. Bacteria and fungi are decomposers. Decomposers break down dead and decaying material. They recycle once-living and nonliving material and make it available for other organisms to use. Bacteria live everywhere on Earth where life is possible.

 

You have probably seen the fruits of some fungi on the ground or growing on tree trunks. Did you know that some fungi live on the underground roots of plants? These fungi, called mycorrhizal fungi, have an interesting relationship with plant roots. These fungi need plant roots to live, and plant roots need the fungi. Plants create carbon as they photosynthesize, and some of the carbon is sent to the plant’s roots. Plant roots then provide carbon to the fungi. The fungi help the plant take in mineral nutrients, such as phosphorus, from the soil.

 

In this study, the scientists were interested in learning about what happens to mycorrhizal fungi after a forest fire. They wanted to know what happens when a fire burns large pieces of wood on the ground, causing the soil to be intensely heated. They also wondered how this would affect the growth of new plants following the wildfire.


Introduction

When a wildfire burns across a forest, logs and stumps on the ground may completely burn up. When this happens the soil beneath and near the logs and stumps is intensely heated. Soils heated in this way turn a light red color (figure 1). These soils, not surprisingly, are called “red soils” by soil scientists.

A forested area that has been burned by a wildfire. There is a little debris on the forest floor and burned tree trunks.
Figure 1. This is an area that had recently experienced a wildfire. Notice the different colors of the soil. The strips of lighter color are the red soils. They are in strips because a log completely burned, causing the soil beneath it to be intensely heated. Most of the soils, however, are black soils. Photo by Garrett Meigs.

Scientists know that red soils have been damaged by fire. Bacteria and fungi are killed, and the chemical properties of the soils change. During a wildfire, the soils that did not have logs or stumps do not get as hot. The fire may burn shrubs and small trees, but the fire passes through quickly without hurting the soil. Soil scientists call these soils “black soils.”

Many scientists believe that, following a wildfire, nonnative invasive plants are likely to spread into the area. This might happen because the burned area is cleared of native plants, opening it for invasive plants. Invasive plants can spread and grow rapidly, which means that their roots may grow rapidly as well.

The scientists in this study wanted to answer two questions: (1) What are the differences, if any, between the growth of nonnative invasive species and the growth of native species in red and black soils following a wildfire? (2) What happens to mycorrhizal fungi following a wildfire?

Reflection Section

Please enable JavaScript in your browser to complete this form.

Click submit to view the answers.

Form entries are not stored.

Loading

Methods

The study was done in Oregon, in an area that had experienced a wildfire in the summer of 2003 (figure 2). This fire burned 36,733 hectares of forest.

 

A map of America with Oregon highlighted and the Deschutes National Forest
Figure 2. The study was done in the Deschutes National Forest in Oregon.

 

In 2004, the scientists collected samples of red soil and black soil from 10 areas. They selected these areas randomly. The scientists collected the samples in pairs, so that each pair of red and black soil had been collected less than 1 meter apart. Each soil sample weighed at least 6.5 kg, and was taken from the top 5 centimeters of soil.

 

Number Crunches

Please enable JavaScript in your browser to complete this form.

Click submit to view the answers.

Form entries are not stored.

Loading

The scientists collected seeds from three native plant species and three invasive plants species that could grow in the area (figures 3 and 4).

 

snowbrush which is a bush with many small white flowers

Figure 3. One of the native plant species
studied was snowbrush (Ceanothus velutinus). Photo by Dave Powell, courtesy of http://Invasives.org.

A spotted knapweed, a taller plant with pink flowers at the top

Figure 4. One of the nonnative invasive plant species studied was spotted knapweed (Centaurea maculosa). Photo by James H. Miller, Forest Service, courtesy of http://Bugwood.org.

They germinated the seeds and planted the seedlings in plastic pots. Each of the pots was filled with one of the soil samples. The seedlings were placed in a special room in a laboratory and allowed to grow for 10 weeks (figure 5).

 

Seedlings growing in small containers
Figure 5. The seedlings were grown for 10 weeks in a special room. Photo by Cassie Hebel.

 

After 10 weeks, the scientists cleaned off the roots of all seedlings and stained them with a special dye. Using a special microscope, the roots were examined (figure 6). The percentage of each root with mycorrhizal fungi was recorded.

 

roots under a microscope lens
Figure 6. The roots were examined using a special microscope.

 

In July 2005, the scientists went back to the 10 sites where the soil sample pairs had been collected. The type of plants growing on each of the 20 sites was identified and recorded.

Reflection Section

Please enable JavaScript in your browser to complete this form.

Click submit to view the answers.

Form entries are not stored.

Loading

Findings

The seedlings grown in red soil had fewer fungi growing on their roots than seedlings grown in black soil. This was true of both native and invasive plants. Invasive plants grown in red soil had between 79 and 98 percent fewer fungi growing on their roots than plants growing in black soil. Native plants grown in red soil had between 61 percent and 98 percent fewer fungi growing on their roots than native plants growing in black soil.

 

Two years after the wildfire, the scientists found that areas with red soil had 50 percent less plant cover than areas with black soil. They found no invasive species growing in the area.

 

Reflection Section

Please enable JavaScript in your browser to complete this form.

Click submit to view the answers.

Form entries are not stored.

Loading

Discussion

The scientists wondered why they found no invasive species in the areas they studied 2 years after the wildfire. One reason may be that there were few nonnative invasive species in the area before the fire. This would have limited the source of nonnative invasive plant seeds. Another explanation may be that nonnative invasive species are not able to compete well with native species in areas where a wildfire has severely heated the soil.

 

The scientists found that areas of forest that have a lot of logs and stumps may not recover as quickly after a wildfire. Plants that grow well in soils that have been heated by fire may be the first to take root and grow in red soils. In the first years after a fire, the type of native plants growing may be different than before the wildfire. When wildfire severely heats the top layer of soil and the roots found there, it appears to harm the fungi that were living on the roots.

 

Reflection Section

Please enable JavaScript in your browser to complete this form.

Click submit to view the answers.

Form entries are not stored.

Loading

Adapted from Hebel, C.; Smith, J.E.; and Kermit, C., Jr. 2009. Invasive plant species and soil microbial response to wildfire burn severity in the Cascade Range of Oregon, Applied Soil Ecology. 42: 150-159. http://www.treesearch.fs.fed.us/pubs/34600.

Natural Inquirer cover for the Wildland Fire 2 issue. There are four squares, the top left is a row of tents, top right has a grasshopper, th bottom left a rattlesnake, and the bottom right a woodpecker. All are photographs.

Part Of

Wildland Fire 2 - Vol. 13 No. 1

Explore Full Journal
SHARE
  • Copy Link
  • Facebook
  • X (Twitter)
  • Pinterest
  • Email
  • Google Classroom
Read Distraction Free Download PDF
  • PDF preview of the 'Don't Judge a Soil' FACTivity.
    In this FACTivity, you will play a game based on Sudoku. The question you will answer in this FACTivity is: What are some of the things that make up soil?...

    FACTivity – Don’t Judge a Soil by Its Color

    • Activity
    • Middle School
    • Less than 30 minutes
    • Game
    • Soil
    In this FACTivity, you will play a game based on Sudoku. The question you will answer in this FACTivity is: What are some of the things that make up soil?...
    • Explore Activity
    • Download Activity (PDF)
    • Explore Activity
    • Download Activity (PDF)

    Part Of

    Don't Judge a Soil by Its Color: Exploring Forest Soil Following a Wildfire

Download PDF

Jump To

  • Education Standards
  • Educator Guide
  • Lesson Plans
  • Education Files
  • Project Learning Tree

Standards addressed in this Article:

The Next Generation Science Standards (NGSS) are a set of K-12 science education standards emphasizing inquiry-based learning, real-world applications, and integrating engineering practices, aiming to deepen understanding of science while promoting critical thinking and problem-solving skills.
  • ESS3.C-M1
    Human activities have significantly altered the biosphere, sometimes damaging or destroying natural habitats and causing the extinction of other species. But changes to Earth’s environments can have different impacts (negative and positive) for different living things.
  • LS2.A-M1
    Organisms, and populations of organisms, are dependent on their environmental interactions both with other living things and with nonliving factors.
  • LS2.A-M2
    In any ecosystem, organisms and populations with similar requirements for food, water, oxygen, or other resources may compete with each other for limited resources, access to which consequently constrains their growth and reproduction.
  • LS2.A-M3
    Growth of organisms and population increases are limited by access to resources.
  • LS2.B-M1
    Food webs are models that demonstrate how matter and energy are transferred between producers, consumers, and decomposers as the three groups interact within an ecosystem. Transfers of matter into and out of the physical environment occur at every level. Decomposers recycle nutrients from dead plant or animal matter back to the soil in terrestrial environments or to the water in aquatic environments. The atoms that make up the organisms in an ecosystem are cycled repeatedly between the living and nonliving parts of the ecosystem.
  • LS2.C-M1
    Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
  • LS2.C-M2
    Biodiversity describes the variety of species found in Earth’s terrestrial and oceanic ecosystems. The completeness or integrity of an ecosystem’s biodiversity is often used as a measure of its health.
The Common Core Standards are educational benchmarks in the United States that outline clear expectations for what students should know and be able to do in English language arts and mathematics from kindergarten through 12th grade, aiming to ensure consistency and coherence in education nationwide.
  • Cite specific textual evidence to support analysis of science and technical texts.
  • By the end of grade 8, read and comprehend science/technical texts in the grades 6-8 text complexity band independently and proficiently.
  • Determine the central ideas or conclusions of a text; provide an accurate summary of the text distinct from prior knowledge or opinions.
  • Follow precisely a multistep procedure when carrying out experiments, taking measurements, or performing technical tasks.
  • Determine the meaning of symbols, key terms, and other domain-specific words and phrases as they are used in a specific scientific or technical context relevant to grades 6-8 texts and topics.
  • Analyze the structure an author uses to organize a text, including how the major sections contribute to the whole and to an understanding of the topic.
  • Analyze the author's purpose in providing an explanation, describing a procedure, or discussing an experiment in a text.
  • Integrate quantitative or technical information expressed in words in a text with a version of that information expressed visually (e.g., in a flowchart, diagram, model, graph, or table).
  • Distinguish among facts, reasoned judgment based on research findings, and speculation in a text.
  • Compare and contrast the information gained from experiments, simulations, video, or multimedia sources with that gained from reading a text on the same topic.
Social Studies Standards are educational guidelines outlining the essential knowledge, skills, and concepts students should learn in subjects such as history, geography, civics, and economics, aiming to provide a comprehensive understanding of societal structures, historical events, and global perspectives.
  • People, Places, and Environments
  • Science, Technology, and Society
  • Time, Continuity, and Change

What Is a Natural Inquirer Journal?

Three Natural Inquirer journal covers with NI bee

 

A Natural Inquirer journal is a collection of 4-8 articles on a related science topic. Journals are written for a middle school audience, but they can also be adapted for both high school students and advanced upper elementary students. Some journals are particularly suited to high school students; you can find our grade level recommendations in the tags on the product page or by filtering journals by grade level.

Journals include:

  • Four to eight articles based on published, peer-reviewed research papers; the articles keep the research paper format (see more below) but are written in language students can understand.
  • A FACTivity for each article, which is an activity to complete after reading the article. The FACTivity helps reinforce major science concepts from the article. These activities are designed to be easy to implement, with few material requirements and options for adapting them for your audience or available resources. Some articles in a journal may have two FACTivities.
  • A short “Welcome to the journal” article about key background information and science concepts that unify the articles included in the journal
  • A glossary of new terms for each article and the introductory materials.
  • A list of related Natural Inquirer publications for each article as well as outside references.
  • Standards correlations, including Next Generation Science Standards, addressed in the articles and the FACTivities.

Journals may also include additional essays (called spotlights), other activities (like crossword puzzles or vocabulary challenges), and more.

 

A screenshot of the article resource tile for "A Flame Changer" showing the three different format option buttons.

Reading Modes

Journals are available in three different formats:

  • Hard copies can be ordered from the website and shipped, all free of charge.
  • PDF versions of the printed journal can be downloaded free on the website. The PDF version directly replicates the content and layout of the printed version. You can also download individual articles as pdfs.
  • The “Read Distraction Free” option allows the individual articles to open in their own window, without the rest of the website being visible. These articles can be found under the “Articles” tab. This version allows readers to scroll to particular sections of the article using the sidebar menu on the left side of the screen. This version also has interactive Reflection Sections and Number Crunches. Students can enter their answers, submit them, and then receive the correct answers to double-check their work. Submitted answers are not saved on the website and will disappear once the window is closed.

What's in a Natural Inquirer Article?

Here, we'll go into more detail about the parts of a Natural Inquirer article and give you some ideas about how they can be used.
  1. Meet the Scientists

    This section introduces the scientists (and others) who worked on the study. In their own words, they each share a memorable science experience, a favorite research project, or something they learned during the course of their education or research.

    Use this section to:

    • Introduce kids to the variety of people who work in science
    • Introduce kids to the variety of scientific fields and give brief descriptions of science-related jobs
    • Explore ways that people interact with science every day

    Next Generation Science Standards (NGSS) applications:

    • Science and Engineering Practices
    • Crosscutting Concepts: Influence of Science, Engineering, and Technology on Society and the Natural World

    Note that specific standards for this particular journal are linked on this educator guide tab.

    Other resources:

    Many of the scientists and engineers featured in this section are also featured on our collector cards. Learn more about their work, how they got interested in their fields, and interesting projects they worked on. Cards can be printed as posters, too.

    A sample Meet the Scientists page, showing four different scientists
  2. Thinking About Science

    This section briefly describes a concept about science or scientific research. This overview can touch on topics like

    • study type (longitudinal study, quantitative vs. qualitative data),
    • behaviors of scientists (conducting literature reviews, collaborating with other specialists, replicating earlier studies),
    • the practice of science (the scientific method, engineering design, data collection, randomization, controls and variables),
    • or other aspects of science (bias, correlation vs. causation).

    Use this section to:

    • Reinforce steps in the scientific method and the process of science
    • Encourage students to think about the practice of science and what it can and cannot tell us
    • Consider the many types of scientific study and what information each type can provide

    Next Generation Science Standards applications:

    • Science and Engineering Practices
    • Life Science Disciplinary Core Ideas (depending on topic)
    • Most Crosscutting Concepts (depending on topic)

    Note that specific standards for this particular journal are linked on this educator guide tab.

    Other resources:

    You can use key words to search for other or related scientific topics on our website (e.g. “longitudinal study,” “bias,” or “sampling”).

    A sample Thinking About Science page from a recent monograph
  3. Thinking About the Environment

    This section provides a brief overview of a topic or concept in environmental/life science. The topic or concept is directly related to the research study that follows. Examples of topics include the carbon cycle, the water cycle, habitat fragmentation, phenology, biodiversity, and ecosystem services.

    Use this section to:

    • Provide important background information to help students understand the research study
    • Serve as a quick reference during reading or class instruction
    • Connect the research article with other activities or media on the same topic

    Next Generation Science Standards applications:

    • Life Science and some Earth Science Disciplinary Core Ideas (depending on topic)
    • Most Crosscutting Concepts (depending on topic)

    Note that specific standards for this particular journal are linked on this educator guide tab.

    Other resources:

    You can use key words to search for more resources on life or earth science topics on our website (e.g. “habitat,” “carbon,” or “genetics”).

    A sample "Thinking About the Environment" section from a recent monograph
  4. Introduction

    This section begins the scientific article format. Much like the published, peer-reviewed study this article is based on, the introduction provides background information for the study – what is currently known and what remains unknown. The introduction culminates in the question(s) the study hopes to answer.

    The introduction is also the first section with a Reflection Section. This section includes two or three questions to help kids reflect on what they’ve just learned in the Introduction. If they are using the online distraction-free reading mode, they can answer these questions directly on the website.

    Use this section to:

    • Review important background information that kids need to understand the study
    • Connect the study to the concepts addressed in the Thinking About Science and Thinking About the Environment sections
    • Understand research questions and hypotheses, including generating their own hypotheses given what they already know

    Next Generation Science Standards applications:

    • Life Science and some Earth Science Disciplinary Core Ideas (depending on topic)
    • Most Crosscutting Concepts (depending on topic)

    Note that specific standards for this particular journal are linked on this educator guide tab.

    Other resources:

    Use one of the guided reading lesson plans to help kids follow the format of a scientific paper.

    A sample introduction page from "Hidden in Plain Sight"
  5. Methods

    This section is the nuts and bolts of the study design – the who, what, when, where, why, and how of the research. Contained within the Methods section are usually maps of the study location or the set-up of study plots, as well as details about what data was collected and how.

    The Methods section also ends with a Reflection Section – two or three questions to help students think through what they just read. These questions are interactive on the distraction-free reading mode.

    Use this section to:

    • Show students how experiments and studies are designed and carried out
    • Explore sampling methods and randomization
    • Introduce various data collection tools (e.g. camera traps, surveys, insect collection tools, weather stations, etc.)
    • Explain bias and how studies are designed to remove bias
    • Help students gain experience with map reading

    Next Generation Science Standards applications:

    • Life Science and some Earth Science Disciplinary Core Ideas (depending on topic)
    • Most Crosscutting Concepts (depending on topic)

    Note that specific standards for this particular journal are linked on this educator guide tab.

    Other resources:

    Many Methods and Findings sections contain Number Crunches, which are simple math exercises designed to help students interact with the data from the study.

    A sample methods section of a monograph article showing a map
  6. Findings

    This section summarizes the data collected during the study. The Findings section usually includes data tables or graphs and highlights the significant data points from the study. This section often mentions statistical analysis or the use of computer programs to model or analyze the data, though these methods are only discussed generally.

    The Findings section also ends with a Reflection Section – two or three questions to help students think through what they just read. These questions are interactive on the distraction-free reading mode.

    Use this section to:

    • Have students practice reading and interpreting graphs and tables
    • Compare results between variables and controls
    • Explain the concept of statistical significance
    • Discuss how no data or negative results still provide valuable information

    Next Generation Science Standards applications:

    • Life Science and some Earth Science Disciplinary Core Ideas (depending on topic)
    • Most Crosscutting Concepts (depending on topic)

    Note that specific standards for this particular journal are linked on this educator guide tab.

    Other resources:

    Search the website for “map” or “graph” to find activities where students can practice making and reading maps and graphs.

    The beginning of a Findings section featuring a large data table
  7. Discussion

    This section concludes each article. In it, we summarize the main findings of the scientists’ study. Additionally, we present the scientists’ ideas about the limitations of their study, the big-picture impacts of their research, and the scientists’ plans for future study or action.

    The Discussion section ends with a Reflection Section – two or three questions to help students think through what they just read, especially general take-aways from the study. These questions are interactive on the distraction-free reading mode.

    Use this section to:

    • Discuss what conclusions can and cannot be drawn from the available data
    • Explain the difference between correlation and causation
    • Explore study limitations and opportunities for further study
    • Brainstorm ways the study findings could be applied to real-world situations

    Next Generation Science Standards applications:

    • Life Science and some Earth Science Disciplinary Core Ideas (depending on topic)
    • Most Crosscutting Concepts (depending on topic)

    Note that specific standards for this particular journal are linked on this educator guide tab.

    Other resources:

    Use the “Designing Your Own Study” resource page for videos of scientists discussing their own research studies. The page also includes educator resources to help students plan their own scientific studies.

    The beginning of the conclusion of "Hidden in Plain Sight"

Additional Resources on the Website

A screenshot of the product tabs for an NI monographOn the website, we pair each journal with a variety of other resources, as well. Use the tabs on the product page to browse through the following:

  • Related activities, including the FACTivity for each article
  • An “About” essay that gives some larger context for the research the scientists conducted or more information about the science topic from the journal
  • A glossary of all boldfaced terms from the journal
  • A “Scientists and Collaborators” page that lists the people involved in the studies in the journal; click on a researcher to reach their bio page and see what other articles they might be featured in
  • A “Related Content” page that lists both Natural Inquirer resources about similar topics and also outside reference materials

Article Selection and Review

Natural Inquirer partners with the USDA Forest Service, so we source research studies by Forest Service scientists that have been peer-reviewed and published in reputable journals. Some of our articles have also been created in collaboration with scientists from other Federal agencies, such as U.S. Geological Survey and the United Nations Food and Agriculture Organization, universities, and other non-profits.

All journal articles are reviewed by scientists who conducted the original research study to verify scientific accuracy. Journals are also reviewed by student editorial review boards of middle or high school students before publication. Additionally, all journals are reviewed by the Forest Service and the U.S. Department of Agriculture before publication.

A screenshot of the citation for "Lights, Camera, Tracks"Every journal article includes a citation of its source study. Many educators pair the original research paper with our article to help more advanced students learn how to read formal research papers. The journal article then serves as adapted primary literature, bridging the two articles.

Lessons

  • PDF preview of the Letter to a Scientist Lesson Plan.
    In small groups (or individually), students will read a Natural Inquirer or Investi-gator article and write a letter to the scientist, asking for clarification on at least four questions. This...

    Lesson Plan – Letter to a Scientist

    • Lesson Plan
    • Middle School
    • Upper Elementary
    • 2-3 Classroom Periods
    • Active Forest Management
    • Agriculture
    • Carbon
    • Citizen Science
    • Engineering and Forest Products
    • Fire
    • Insects
    • Pollinators
    • Pollution
    • Recreation
    • Social Science
    • Water
    • Wilderness
    • Wildlife
    • Guided reading
    • Letter Writing
    • Questioning
    • Scientist
    In small groups (or individually), students will read a Natural Inquirer or Investi-gator article and write a letter to the scientist, asking for clarification on at least four questions. This...
    • Explore Lesson Plan
    • Download Lesson Plan (PDF)
    • Explore Lesson Plan
    • Download Lesson Plan (PDF)

    Part Of

    Wildland Fire 2 - Vol. 13 No. 1

  • PDF preview of the first page of Forest Poems Lesson Plan
    The purpose of this lesson plan is to give students a chance to reflect on their reading and create poems to express what they have learned. The lesson plan is...

    Lesson Plan – Forest Poems

    • Lesson Plan
    • Middle School
    • Upper Elementary
    • 1 Classroom Period
    • Active Forest Management
    • Agriculture
    • Carbon
    • Citizen Science
    • Engineering and Forest Products
    • Fire
    • Insects
    • Pollinators
    • Pollution
    • Recreation
    • Social Science
    • Water
    • Wilderness
    • Wildlife
    • Creative Writing
    • Haiku
    • Nature
    • Reflection
    The purpose of this lesson plan is to give students a chance to reflect on their reading and create poems to express what they have learned. The lesson plan is...
    • Explore Lesson Plan
    • Download Lesson Plan (PDF)
    • Explore Lesson Plan
    • Download Lesson Plan (PDF)

    Part Of

    Wildland Fire 2 - Vol. 13 No. 1

  • PDF Preview of Reading a Natural Inquirer Article Lesson Plan
    This lesson plan introduces students to the different sections of a Natural Inquirer article. Additionally, it helps the students understand the content of the article through the use of graphic...

    Lesson Plan – Reading a Natural Inquirer Article – FACELook

    • Lesson Plan
    • Middle School
    • 2-3 Classroom Periods
    • Graphic Organizer
    • Guided reading
    • Reading for Information
    • Scientific Article Format
    This lesson plan introduces students to the different sections of a Natural Inquirer article. Additionally, it helps the students understand the content of the article through the use of graphic...
    • Explore Lesson Plan
    • Download Lesson Plan (PDF)
    • Explore Lesson Plan
    • Download Lesson Plan (PDF)

    Part Of

    FACELook! Exploring the Relationship Between Carbon, Photosynthesis, and the Roots of Trees

Education Files

Project Learning Tree

If you are a trained Project Learning Tree educator, you may use “Nature’s Recyclers” and “Nothing Succeeds Like Succession” as additional resources.

Glossary

View All Glossary
  • academic

    (a kə de mik): Of or relating to school or college.

  • invasive

    (in vā siv): Tending to spread especially in a quick or aggressive manner, such as a nonnative species growing and dispersing easily, usually to the detriment of native species and ecosystems.

  • microorganism

    (mī krō ȯr gə ni zəm): An organism or life form of microscopic size.

  • microscopic

    (mī krə skä pik): Able to be seen only through a microscope; very small.

  • mycology

    (mī kä lə jē): (1) A branch of biology dealing with fungi; (2) fungal life.

  • mycorrhizal

    (mī kə rī zəl): Characteristic of the joining of a fungus and the root of a plant in which the fungus grows around or through the root providing nutrients and water to it and receiving food from it.

  • native

    (nā tiv): Living or growing naturally in a particular region.

  • nonnative

    (nän nā tiv): Not naturally occurring in an area.

  • randomly

    (ran dǝm lē): So that each possibility has a definite and especially an equal probability of occurring.

  • sample

    (sam pəl): A small subset group, representative of the entire group.

  • species

    (spē sēz or spē shēz): A category of living things that ranks below a genus, is made up of related individuals able to produce fertile offspring, and is identified by a two-part scientific name.

  • Jane E. Smith kneels on some vegetation in a forest while holding a trowel.

    Jane E. Smith

    Botanist

    My most awe-inspiring moment as a scientist came when walking deep into an old-growth forest just a few weeks after a severe wildfire had killed all of the trees. The...
    View Profile
  • Cassie Hebel kneels on the ground in a forest and takes a soil sample with a trowel.

    Cassie Hebel

    Soil Scientist

    My favorite science experience is studying mycology and learning to identify all types of mushrooms. It is fun to look inside the wonderful kingdom of fungi. From the smallest underground...
    View Profile
Back to Top
  • Natural Inquirer - Homepage
  • USDA
  • USDA Forest Service logo.

The Natural Inquirer program produces a variety of science education materials for PreK through grade 12. Natural Inquirer products are produced by the USDA Forest Service and other cooperators and partners.

Please enable JavaScript in your browser to complete this form.
* denotes mandatory fields
Loading
  • Facebook
  • Pinterest
  • X, formerly Twitter
  • YouTube
  • About Natural Inquirer
  • Team
  • Partners
  • Press & Past Events
  • Contact Us
  • Accessibility Policy
  • Privacy Policy
  • Shipping Policy
© 2026 - Natural Inquirer | Website Credit