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Test your knowledge on contamination, floodplains, and watersheds.
Test your knowledge on contamination, floodplains, and watersheds.

The question you will answer in this FACTivity is: How do air temperature patterns relate to a yearly natural event,…
The question you will answer in this FACTivity is: How do air temperature patterns relate to a yearly natural event, such as the emergence of a particular species of flower,...

With two-thirds of the U.S. population drinking water from surface sources such as streams, rivers, lakes, and reservoirs, it is…
With two-thirds of the U.S. population drinking water from surface sources such as streams, rivers, lakes, and reservoirs, it is very important that these water sources are protected. Part of...

Denali National Park in Alaska has one of the largest reported golden eagle nesting populations. Golden eagles are legally protected…
Denali National Park in Alaska has one of the largest reported golden eagle nesting populations. Golden eagles are legally protected to help the population survive. Park managers were not sure...

Water temperature helps regulate aquatic ecosystems, and, for many aquatic organisms, life-cycle phases are tied to water temperature. Salmon eggs,…
Water temperature helps regulate aquatic ecosystems, and, for many aquatic organisms, life-cycle phases are tied to water temperature. Salmon eggs, for example, generally require a certain number of degree days...