space

The spinning of the Earth on its axis that causes night and day.

• Rotate
• Revolve

The moon appears to change shape because of _____.

• the Moon's revolution around Earth
• the seasons of the year
• the movement of stars in they sky
• Earth's rotation on its axis

What causes Earth's seasons?

• the tilt of Earth's axis
• Earth's rotation
• the revolution of the Moon
• Earth's distance from the Sun

It takes Earth _________ to make one complete rotation on its axis.

• 24 hours
• 365 days
• 28 days
• 24 days

To decrease or get smaller

• waning
• waxing

When does a waning moon occur?

• just after a full moon
• just after a crescent moon
• when all of the Moon's near side is dark
• between a first-quarter moon and a new moon

How does tides form?

• by the earth's gravity

• the moon's gravity

• sun's gravity

• stars gravity

The lunar cycle begins with which moon phase?

• New Moon
• Full Moon
• Waxing Crescent
• Waning Gibbous 

What does "Gibbous" mean?

• Smaller than 1/2
• Larger than 1/2
• Crescent shaped
• Gigantic 

What happens when the area you live in tilts away from the sun?

• It is summer
• It is spring
• It is fall
• It is winter