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The sun is directly overhead at 23.5 degrees north or south at this time.


The study of the moon, starts and other objects in space.


The imaginary line passing through Earth's center at the North and South poles. Reason why earth has it's seasons.


Movement of Earth around the sun, or one object around another object


The path of Earth as it revolves around the sun.


A measurement of distance from the equator, expressed in degrees north or south.


The sun is directly overhead at the equator at this time.


The spinning motion of the Earth around it's axis. Causes day and night.

Vernal Equinox

Occurs in March and marks the beginning of spring in the Northern Hemisphere.

Autumnal Equinox

Occurs in September and marks the beginning of fall in the Northern Hemisphere.

A Day

24 hour cycle of day and night is called

What causes the phases of the moon, eclipses, and tides?

The position of the moon, earth and the sun cause the phases of the moon, eclipses and tides.


The different shapes of the moon you see from earth

The phase of the moon you see depends on

How much of the sunlit side of the moon faces the earth.

How long does it take earth to rotate on it's axis?

365 1/4 days

How long does it take earth to make one revolution around the sun?

24 hours

What causes day and night?

Earth's rotation on it's axis.

Why is it warmer near the equator than near the poles?

The equator gets the most direct sunlight.

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