Planet Earth (Chapter 2)

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Solar Energy

Energy from the sun

Rotation

One complete spin of Earth on it's axis. Takes 24 hours to complete, causes day and night.

Revolution

The Earth's trip around the sun, takes 365 1/4 days to complete.

Latitude

The distance north and south of the equator.

Tropics

Regions near the equator where season are based on rainfall not temperatures.

Freshwater

Water with out salt.

Glaciers

Large areas of slow moving ice

Surface Water

Water found below the Earth's surface.

Water Vapor

Water that is in the air as an invisible gas.

Water Cycle

The movement of water from earth's surface and back.

Landforms

The shapes on Earth's surface.

Continents

The seven large landmasses

Plate tectonics

Theory that suggest that earth's surface is divided inot a dozen or so slow moving plates, or pieces of Earth's surface.

Lava

The magma that reaches Earth's surface.

Earthquakes

Sudden violent movements of Earth's crust.

Weathering

The process that breaks rock down into smaller pieces.

Erosion

The movement of sediment from one location to another.

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