What causes the day/night cycle?

• Earth turning on its axis.
• Earth revolving around the Sun.
• The Sun revolving around the Earth.
• The Moon revolving around the Earth.

The Sun, like Earth, has . . .

• water
• mountains
• air
• layers

What is a characteristic that the moon and the Earth do NOT have in common?

• craters
• mountains
• rocks
• water

Why does the Sun appear to move across the sky during the day?

• The Sun revolves around the Earth.
• The Earth revolves around the Sun.
• The Sun rotates on its axis.
• The Earth rotates on its axis.

In what direction does the Sun appear to rise every morning?

• North
• East
• West
• South

How long is one Earth rotation?

• 28 days
• 24 hours
• 365 days
• 1 year

What would happen if the Earth's rotation became slower?

• The day would become longer.
• The day would become shorter.
• The year would become longer.
• The year would become shorter.

When do shadows appear to be the longest length?

• Early afternoon
• 12:00 pm
• At sunrise or sunset
• 12:00 am

What is a characteristic that the Earth and Moon share, but not the Sun?

• They have gravity.
• They have a rocky surface.
• They are made of gases.
• They have no rings.

What effect does the Moon have on the Earth?

• It gives us day and night.
• It causes tides.
• It gives us years.
• It makes us rotate on our axis.