Calculating Orbital Motion

Multiple Choice

What caused smaller masses to orbit larger masses.

• velocity

• gravity

• orbit

Multiple Choice

Without gravity, masses would move in (blank) lines.

• horizontal

• straight

• parallel

Multiple Choice

Motion of stars and galaxies near each other strongly suggests velocity is pulling the bodies toward each other.

• true

• false

Multiple Choice

Comets move past our outer planets and return because of gravity.

• True

• False

Multiple Choice

(blank) have masses much larger than large stars.

• Black holes

• Sun

• Planets

Multiple Choice

The sun is (blank) times the mass of Earth.

• 500

• 333,000

• 100

• 1,000