Astronomy Study Guide

An AU is the ...

• greatest distance between Pluto and the Sun.
• closest distance between any two planets.
• average distance between the Sun and Earth.
• average distance between Earth and the Moon.

The largest object in the Solar System is ...

• The Sun
• Jupiter
• Saturn
• Neptune

When the moon appears to be "growing" from Earth's view, we call this a ______ phase

• crescent
• waxing
• gibbous
• waning

The line that separates light from dark on the moon is called the ___________________.

• phase
• terminator
• gibbous
• model

What is a moon phase?

• The shape of the illuminated part of the Moon as it appears from Earth.
• when the Moon is not visible from Earth
• looks like a FULL circle from Earth
• looks like MORE than half a circle from Earth

What does it mean to illuminate an object?

• To make it invisible
• To make it change shape
• To make it float in the air
• To make it visible by shining light on it

True or False: The sun is a star and it is the main source of light in our solar system.

• True
• False

Which is a crescent moon?

• 
• 
• 

Which is a full moon?

• 
• 
• 

What is the correct arrangement of structures in the Universe from smallest to largest?

• Milky Way, Universe, Solar System, Earth

• Solar System, Universe, Milky Way, Earth

• Earth, Solar System, Milky Way, Universe