Mixture of sand, silt, clay, rock, and humus (plant and animal remains)

A very small life form, especially a bacterium

Actions by one thing that have an effect on a different or separate thing

An organism that consumes dead of nonliving biomass without need for internal digestion

What gas do plants absorb?

This _____________ matter, which is not usable by people, is necessary for plants.

When an organism dies, it's energy is returned to soil by _______________, which are organisms that consume dead or nonliving biomass.

Carbon dioxide moves from the atmosphere and into living things as a part of what process?

Liquid water is moved from living things to the environment when animals

Matter moves directly from plants to animals plants are eaten by animals. Matter also moves from plants to animals indirectly through

How does the decomposition of a fallen tree contribute to the health of a forest?

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