(an ǝ rō bik): Living, active, occurring, or existing in the absence of free oxygen.

(bak tir ē ǝ): (Singular: bacterium) A group of single-celled microorganisms that live in soil, water, the bodies of plants and animals, or matter obtained from living things and are important because of their chemical effects and disease-causing abilities.

(klī mǝt): The average weather conditions of a particular place or region over a period of years.

(käm pakt): To pack closely and firmly together.

(ga sē ǝs or ga shǝs): Having the form of or being gas.

(grēn hau̇s i fekt): A warming of Earth’s surface and the air above it caused by gases in the air that trap energy from the Sun.

(pȯr ǝs): Full of tiny openings or spaces (as in the skin or the soil); capable of absorbing liquids.

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

(spe sh(ǝ) lǝ zā shǝn): Being designed, trained, or fitted for one particular purpose or job or area of study.