Solar System

Astronomers would see planets moving in one direction across the sky and then they would start to move backwards and then forward again.  What was this observation called?

• ellispse
• retrograde motion
• eccentricity
• perihelion

According to Kepler's second law when do planets sweep out more area?

• In more time
• In less time
• In the same time
• Randomly

Which planet has the smallest pull of gravity?

• Saturn
• Jupiter
• Neptune
• Mercury

Which planet has a large shield volcano on it?

• Venus
• Jupiter
• Mars
• Pluto

Which of the following is not a characteristic of a habitable planet?

• Oxygen
• Atmosphere
• Magnetic Field
• Water

What is the core of Jupiter composed of?

• Plasma
• Iron
• Helium
• Liquid Metallic Hydrogen

What does the interstellar cloud form into next?

• Planetesimals
• Planets
• Solar Nebula
• The Sun

Why do we think Jupiter formed first?

• Because of its location
• Because of its spin
• Because of its size
• Because of its orbit

What are left over pieces of our Solar Systems early formation called?

• Asteroids
• Planetesimals
• Comets
• Nuclei

Besides changing the distance between objects how else can we change the force of gravity?

• Change their atmosphere
• Change their rotation
• Change their mass
• Change their volume