A hot, thick, and rocky layer around the core. The mantle is solid, but its temperature makes it able to flow.

The thin layer of rocks and mineral that surrounds the mantle. The surface of the crust includes the land areas where people live, and the ocean floor.

A think layer of gases or air about Earth's surface. Earth's atmosphere holds in heat from the sun, which makes life possible.

Landforms are shapes and types of land.

Water covers about 75 percent of Earth's surface. 97 percent of water is salt water and 3 percent is fresh water. Fresh water is what people need for many things.

A process that breaks down rocks into tiny pieces. There is chemical and mechanical weathering.

A process in which water, ice, or wind remove small pieces of rock.

The process of depositing material eroded and carried by water, ice, or wind. Deposition creates landforms such as sandy beaches.

Large areas of flat or gently rolling land, often formed by deposition.

A large, mostly flat area that rises above the surrounding land. At least on side of a plateau has a steep slope.

A stretch of low land between mountains or hills. Rivers often form valleys by wearing away rocks.

Flat plains built the seabed where a river fans out and deposits material over many years.

A theory that states that Earth's crust is made up of huge blocks called plates.

Huge blocks that make up Earth's crust. Plates include continents or parts of continents, and the ocean floor.

Molten, nearly melted rocks. Plates sit on magma.

Seams in Earth's crust, often between the boundaries between plates.

A rotation is a complete turn, and takes about 24 hours. Earth rotates around its axis.

There are time zones, because Earth rotates towards the East, making the days begin earlier in the east than the west. Time zones are areas sharing the same time. Times in neighboring zones are one hour apart.

The path one object makes as it revolves around another. Earth travels around the sun in an oval shaped orbit.

A point at which everywhere on Earth days and nights are nearly equal in length. There is the March and September equinox.

An imaginary line that runs through the North and South poles. Earth's axis is tilted relative to its orbit.

A complete journey around the sun. It takes Earth 365 1/4 days to complete one revolution.

A point at which days are longest in one hemisphere and shortest in the other. There is the June and December solstice

Solid because of the great pressure from the layers above it

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Key Terms 2.1-2.5

Term	Definition
Mantle	A hot, thick, and rocky layer around the core. The mantle is solid, but its temperature makes it able to flow.
Crust	The thin layer of rocks and mineral that surrounds the mantle. The surface of the crust includes the land areas where people live, and the ocean floor.
Atmosphere	A think layer of gases or air about Earth's surface. Earth's atmosphere holds in heat from the sun, which makes life possible.
Landforms	Landforms are shapes and types of land.
Water	Water covers about 75 percent of Earth's surface. 97 percent of water is salt water and 3 percent is fresh water. Fresh water is what people need for many things.
Weathering	A process that breaks down rocks into tiny pieces. There is chemical and mechanical weathering.
Erosion	A process in which water, ice, or wind remove small pieces of rock.
Deposition	The process of depositing material eroded and carried by water, ice, or wind. Deposition creates landforms such as sandy beaches.
Plains	Large areas of flat or gently rolling land, often formed by deposition.
Plateau	A large, mostly flat area that rises above the surrounding land. At least on side of a plateau has a steep slope.
Valley	A stretch of low land between mountains or hills. Rivers often form valleys by wearing away rocks.
Delta	Flat plains built the seabed where a river fans out and deposits material over many years.
Plate Tectonics	A theory that states that Earth's crust is made up of huge blocks called plates.
Plates	Huge blocks that make up Earth's crust. Plates include continents or parts of continents, and the ocean floor.
Magma	Molten, nearly melted rocks. Plates sit on magma.
Fautls	Seams in Earth's crust, often between the boundaries between plates.
Rotation	A rotation is a complete turn, and takes about 24 hours. Earth rotates around its axis.
Time Zones	There are time zones, because Earth rotates towards the East, making the days begin earlier in the east than the west. Time zones are areas sharing the same time. Times in neighboring zones are one hour apart.
Orbit	The path one object makes as it revolves around another. Earth travels around the sun in an oval shaped orbit.
Equinox	A point at which everywhere on Earth days and nights are nearly equal in length. There is the March and September equinox.
Axis	An imaginary line that runs through the North and South poles. Earth's axis is tilted relative to its orbit.
Revolution	A complete journey around the sun. It takes Earth 365 1/4 days to complete one revolution.
Solstice	A point at which days are longest in one hemisphere and shortest in the other. There is the June and December solstice
Inner Core	Solid because of the great pressure from the layers above it
Outer Core	Hot liquid metal

Created by: gdoherty

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