Question

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what is the primary cause of day and night on earth? *
the earths orbit around the sun
the earths rotation on its axis
the earth moving closer and farther from the sun
the tilt of the earths axis
which imaginary line divides the earth into the northern and southern hemispheres?
prime meridian
international date line
equator
tropic of cancer

Explanation:

• For the first question: The Earth rotates on its axis. As it rotates, different parts of the Earth face the Sun (day) or are away from the Sun (night). The Earth's orbit around the Sun causes seasons. The Earth moving closer and farther from the Sun is part of its orbit and not the cause of day - night. The tilt of the Earth's axis is related to seasons and not the primary cause of day - night.
• For the second question: The Equator is an imaginary line that divides the Earth into the Northern and Southern Hemispheres. The Prime Meridian divides the Earth into Eastern and Western Hemispheres. The International Date Line is related to time zones. The Tropic of Cancer is a latitude line in the Northern Hemisphere.

Answer:

• First question: The Earth’s rotation on its axis
• Second question: Equator