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Earth & Moon

Characteristics of the Earth and Moon

QuestionAnswer
Lithosphere: The rocky surface of the Earth
Atmosphere: The pocket of air that surrounds the Earth
Hydrosphere All the water on the surface of the earth and underground, including ice and water vapor
Earth Composition 25% of Earth is dry land 75% is covered with water 97% of this water is oceans 3% is fresh water 75% of fresh water is frozen in the polar ice caps Which leaves 25% usable fresh water
Crust The upper layer of the Earth. This layer is from 3 miles to 25 miles thick. The Earth’s tectonic plates are located here.
Mantle The largest layer of the Earth. It is 1800 miles thick. It is composed of very hot, dense melted rock. The movement of this liquid is what moves the tectonic plates.
Core The center of the Earth.
Axis An imaginary line running from the North Pole to the South Pole through the center of the Earth
Rotation The spinning of a planet or moon on its axis
Revolution The time it takes for an object to travel completely around another object it orbits.
Orbit The path one object takes around another object in space
Tide The rise and fall of the water level of the ocean near the shore that is caused by the pull of gravity of the moon
Created by: twaller
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