Planetary Science 6.1-7.2

The smallest craters are called

• simple craters

• complex craters

• terraced craters

• Frank

Craters that often have central peaks and ejecta thrown out a long ways are called

• simple craters

• complex craters

• terraced craters

• Jethro

Really big craters that have things that look like giant steps leading from the crater floor to the rim are called

• simple craters

• complex craters

• terraced craters

• Belinda

If you have a crater and you want to calculate the approximate size of the projectile that made the crater, you would

• add Pi (Pie).

• multiply by 5.

• divide by 20.

• divide by 2.

Craters on the Moon and Earth were caused by

• collisions with objects like asteroids.

• cave-ins where martians dug away the soil underneath.

• volcanic activity.

• plate tectonics.

A crater will be larger when the projectile that caused it is moving

• faster.

• slower.

A crater will be larger when the projectile that caused it has

• less mass.

• more mass.

Craters are formed when...

• a projectile pounds a hole into the ground.

• a projectile burrows into the ground, is vaporized and explodes.

• a projectile hits the ground and stops.

• the thing with the stuff happens.

This is used to measure distances inside our solar system

• Astronomical Units

• Light Years

This is used to measure distances outside our solar system

• Astronomical Units

• Light Years