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15 Cards in this Set

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When the earth changes from a solid to a liquid, What is it called?
Athenosphere
The zone that makes up nearly two thirds of the eath's mass is the.
mantle
The boundary between the earth's crust and mantle is called the
Moho
The amount of matter in an object is the object's
mass
The wobbling motion made by the earth's axis as it turns in space is called.
precession
When the sun's rays reach their highest angle in the Northern Hemisphere, the season there is
summer
At noon on the winter solstice, the sun's vertical rays strike the earth along the
Tropic of Capricorn
The force of attraction betwen all matter in the universe
Gravity
The principle that the force of attraction between two objects depends on the masses and the distance between the objects.
Law of Gravitation
The zone of rock below the Earth's crust.
Mantle
The center of a planetary body, such as the Earth.
core
The outermost zone of the solid Earth.
Crust
The movement of a planet around the Sun
Revolution
The spinning of a planet on its axis
Rotation
The beginning of spring
Vernal Equinox