1.
community of all the living things in an area and the environment in which they live
2.
a series of plants and animals, each of which depends on the one below it for food. A food chain usually forms part of a much larger food web
3.
the feeding relationships within an ecosystem. Each living thing in a food web provides food energy to other living things within that ecosystem
4.
made up of water that is fresh, not salty. This term is also used to describe creatures that live in fresh water, such as freshwater fish
5.
damage to the natural environment caused by harmful substances; also refers to harmful substances
6.
a geographic area that includes all of the land and waterways that drain into a body of water. Sometimes a watershed is also called a drainage basin
7.
a large mass of ice found near Earth’s poles (continental glacier) or in a high, cold mountain valley (alpine glacier)
