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amount of mass in a certain amount of volume (ex. which is more dense? a coke can filled with feathers or a coke can filled with rocks?)
Theory of Continental Drift
Proposed by Alfred Wegener who claimed that the continents were once part of one giant land mass called Pangea which later broke apart causing their present positions
outer part of Earth is divided into several distinct segments that occasionally shift
rocks that are formed from bits of weathered rock or remains of tiny organisms being pressed together into a solid mass
physical breakdown of rock into smaller pieces; may be broken down by wind, water, ice, etc.
transportation of sediment from one place to another by wind, flowing water, ice, and gravity
resources that cannot be replaced or reproduced in a lifetime (ex. fossil fuels, coal, petroleum, natural gas)
resources that can be replaced in a relatively short period of time (ex. plants, animals, water)
source of energy that comes from the remains of plants and animals that died millions of years ago (ex. natural gas, petroleum, and coal)
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