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25 Cards in this Set
- Front
- Back
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Biosphere.
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The part of earth that includes all life forms.
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Tilt.
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23.5 degrees.
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Tropics.
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Warm low-latitude areas near the equator.
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Rotation.
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One complete spin of earth on it's axis.
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Equinox.
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time when earth's poles are not pointed toward or away from the sun.
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Environment.
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All the biological, chemical, and physical conditions that interact and affect life.
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Revolution.
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One elliptical orbit of earth around the sun.
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Solar energy.
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Energy from the sun.
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Solstice.
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Time that earth's poles point in their greatest angle toward or away from the sun.
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Lithosphere.
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The solid crust of the planet.
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Why are planets visible?
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Because they reflect light.
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In the Northern hemisphere, the March equinox marks the beginning of _____.
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Spring.
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The earth is about _____ away from the sun.
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93 million miles.
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The Sun is about _____ times larger than Earth.
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100.
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The shape of Earth's orbit around the Sun is _____.
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Elliptical// Oval Shaped.
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The ocean floor is part of the _____.
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lithosphere.
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The North pole points toward the _____.
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North star.
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Earth's _____ holds the atmosphere around the planet.
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Gravity.
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Earth revolves around the sun in _____ days.
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365 1/4.
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_____ are caused by the gravitational pull o the Sun, Moon, and Earth.
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Ocean tides.
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The tropic of Cancer is located in the _____.
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Northern Hemisphere.
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The solstices occur each year on about _____ and _____.
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December 22 and June 22.
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The _____ causes the sun to appear to rise and set.
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Earth's rotation.
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The _____ contains clouds and fog.
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Hydrosphere.
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In the Southern Hemisphere, the March equinox marks the beginning of _____.
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Fall.
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