Solar System Formation & Motion

What solar system models places the Sun at the center? 

• Geocentric Model
• Heliocentric Model
• Ptolemy Model
• Artistotle Model

Where did the materials used to create planets in our solar system come from? 

• clumps of rocky material between the stars
• the same cloud of gas as our sun
• they flung out of our young sun
• gas cloud in the orion nebula

Because of temperature in the protoplanetary disk...

• Rocks, metals and ices froze in the inner region only
• Rocks and metals froze in both regions and ice only in outer region
• Rocks and metals froze in the inner region and ice in outer region
• Rocks and metals froze in both regions and hydrogen gas froze only in outer region

The order of the formation of the solar system: 
Solar nebula - protostellar disk- nuclear fusion - sun - planetesimals - planets

• True
• False

Which object will hit the ground first? A 300 kg ball or a 30 kg ball. 

• The 30 kg ball
• The 300 kg ball
• Both hit at the same time
• It only works on the moon

Why does the Earth orbit the sun? 

• The sun pulls Earth toward it.
• The sun pulls Earth in an orbit.
• The sun pushes Earth away.
• Electromagnatism from the sun keeps Earth in orbit.

According to Kepler's laws planets, how do planets move? 

• At a constant speed in circular orbits
• In elliptical orbits and faster at the perihelion
• In elliptical orbits and slower at the perihelion
• At a constant speed in elliptical orbits

Which of the following has the greatest gravitational force? 

• 2 kg masses 100 cm apart
• 10 kg masses 10 cm apart
• 2 kg masses 10 cm apart
• 10 kg masses 100 cm apart

Which planet has more gravity? 

• Earth
• Jupiter
• Mercury
• Neptune

Which planet has the longest orbital period and slowest orbital velocity? 

• Mercury
• Earth 
• Jupiter
• Neptune