Introduction to Astronomy

About how long does it take the moon to make one complete cycle around the earth?

• 65 days
• 8 days
• 365 days
• 28 days

The moon seems to change shape from day to day in a cycle that lasts about a month as it goes through ....

• revolutions
• phases
• rotations
• eclipses

One complete revolution of the Earth around the sun takes about

• one rotation
• half a year
• one year
• one season

The Earth takes about how long to complete one rotation of its axis.  

• 365.25 days
• 24 hours
• 30 days
• 1 week

A body that orbits another object is called a...

• Moon
• Planet
• Satellite
• Comet

What phase of the moon is pictured here?

• New moon
• Waxing crescent moon
• Full moon
• Waxing gibbous moon

What phase of the moon is pictured here?

• New moon
• First quarter moon
• Full moon
• Last quarter moon

What does this diagram represent?

• Solar eclipse
• Lunar eclipse

What does this diagram represent?

• Solar eclipse
• Lunar eclipse

True or False: Earth's orbit around the Sun is a perfect circle.

• True
• False