Earth and Sun: What Causes Day and Night?

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sunrise

A time in the morning when the sun appears over the horizon. The sun always rises in the east.

equator

An imaginary circle around the middle of the earth, halfway between the North Pole and the South Pole

axis

An imaginary line that passes through Earth's center and the North and South poles

revolution

The movement of an object around another object

rotation

Turning around an axis

sunset

a time in the evening when the Sun disappears under the horizon. The Sun always sets in the west.

compass

an instrument for determining directions, as by means of a freely rotating magnetized needle that indicates magnetic north.

1 year

how long it takes Earth to make 1 revolution around the Sun

24 hours

how long it takes Earth to rotate on its axis

shadow

the dark area behind an object that blocks light

Sun

the star at the center of the solar system around which all of the other solar system objects orbit

day

the time between sunrise and sunset on Earth

night

the time between sunset and sunrise on Earth

orbit

to move or travel around an object in a curved path


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