Unit 3 Solar System Test 2025

The __________ has planets, moons, comets, and asteroids.

• 
  solar system

• Earth

• Rotation

• United State

The __________ ___________is the theory that the sun and planets all formed from a rotating cloud of gas and dust.

• Big Bang Theory
• Nebular theory
• Plate tectonics Theory
• Peak Theory

As the debris began rotating, it also flattened into an _________ ________

• Nebular Cloud
• Protostar disk
• Accretion disk.
• Supergiant star

Collisions of material over time condensed and formed larger and larger objects called

• planetesimals.
• protoplanets
• dwarf planets
• gas giants

Another reason gas planets are further out is because when the sun was forming....

• the inner planets collided with them and pushed them there.
• they have always been in that location.
• heat and solar winds pushed the gases further out
• aliens connected giant chains to the planets and pulled them there

True or False: Gravity helps the Earth to stay in orbit around the Sun

• True
• False

Which scientist is credited with first describing the mathematics of gravity?

• Thomas Edison
• Einstein
• Fermi Dirac
• Isaac Newton

What do we call the force of gravity on an object?

• Weight
• Mass
• Speed
• Acceleration

True or False: The more mass an object has, the faster it will fall.

• True
• False

What natural phenomena occurs on Earth due to the gravity of the Moon?

• Earthquakes
• Hurricanes
• Volcanic Eruptions
• Ocean Tides