Parts of an Impact Crater and Moon Phases

The bottom of the crater. It can be flat or bowl shaped, and is usually below the surrounding ground level.

• Floor

• Rim

• Wall

• Depth

The raised, circular formation surrounding the floor of the crater.

• floor

• rim

• wall

• Depth

The sides of the crater that rise to the rim.

• Depth

• Wall

• Rim

• Ray

In a crater, the perpendicular (at right angles) measurement downward from the original ground level to the crater floor

• floor

• rim

• depth

• diameter

The length of a straight line from one side of a circular crater to the other, through the center point of the crater

• diameter

• rim

• ejecta

• crater

The material thrown out of the crater during impact

• rejection

• ejecta

• gravel

• ray

A bright streak starting from the crater and extending for great distances.

• ejecta

• smear

• streak

• ray

A bowl-shaped depression produced by an impact.

• complex crater

• simple crater

• round crater

• volano

An impact structure larger than a simple crater displaying complex morphology

• Simple Crater

• Complex Crater

• Volcanic Crater

• Curved Crater

How many days does it take for the moon to make one complete orbit around the earth?

• 13.5 Days

• 27 Days

• 30 Days

• 4 Days