Geography: Ch 3

the short-term changes in the air for a given place and time

a region's average weather conditions over a long period of time

winds that blow in the same direction over large areas of Earth

large streams of surface seawater; they move heat around Earth

the place where two air masses of different temperatures or moisture content meet

a seasonal wind that brings either dry or moist air

an area of tall grasses and scattered trees and shrubs

the place where a plant or animal lives

no longer here; a species that has died out has become ________

decayed plant or animal matter;  it helps soil support abundant plant life

the spread of desert-like conditions

any material in nature that people use and value

a resource that Earth replaces naturally, such as water, soil, trees, plants, and animals

a semidry grassland or prairie; often bordering deserts

permanently frozen layers of soil

a group of plants and animals that depend on each other for survival, and the environment in which they live

a resource that cannot be replaced naturally;  coal and petroleum are examples of this

the clearing of trees

nonrenewable resources that formed from the remains of ancient plants and animals; coal, petroleum, and natural gas are all examples of this

the production of electricity from waterpower, such as from running water