the solid, rocky part of Earth’s crust

the layer of gases surrounding Earth

a community of organisms interacting with each other and their nonliving environment

5. the feeding relationships among all the organisms in an ecosystem

referring to land

a nutrient that xylem transports to the cells in a vascular plant

a microorganism that act as decomposers

an organism that breaks down plant and animal material into simple chemicals

10. to rely or need the same resource as another organism

the ability to make things happen

an organism that lacks chlorophyll and gets nutrients from dead or living organisms

13. an organism that cannot make its own food

a compound made from carbon and oxygen

15. microscopic plantlike organisms in aquatic environments that produce their own food

16. an organism, such as a plant or algae that makes its own food

a description of the feeding relationships between organisms in an environment

18. a system of interacting living organisms on Earth

all of the liquid on Earth in solid (ice), liquid (water), and gas (water vapor)

to act upon one another

What is the abbreviation for carbon dioxide?