Orbits Review

What is  the period of revolution?

• How long it takes a planet to orbit the sun
• How long it takes a planet to spin around
• How fast a planet spins
• How elliptical a planet's orbit is

When a planet is closest to the sun in it's orbit, it is called ____.

• perihelion
• aphelion
• parahelical
• aphahelical

What is the shape of a planet's orbit?

• circular
• elliptical
• spherical
• round

Planets move in elliptical orbits is Kepler's _____ Law.

• 1st
• 2nd
• 3rd
• 4th

Line drawn from the sun to planet sweeps out equal areas in equal time is Kepler's _____ Law.

• 1st
• 2nd
• 3rd
• 4th

If a planet is closer to the sun, its orbit will be _____ than one farther away. 

• longer
• slower
• bigger
• shorter

The average distance between the Earth and the sun is a(n) ____.

• light year
• light minute
• astronomical year
• astronomical unit

Kepler's 2nd Law states that a planet's velocity is ____ when farther from the sun.

• fastest
• slowest
• unchanged
• the same

Kepler's First Law states

• objects attract other objects with a force that is directly proportional to the product of their masses

• the square of the ratio of the periods of any two planets revolving around the Sun is equal to the cube of the ratio of their average distance from the Sun

• An imaginary line joining a planet and the sun sweeps out an equal area of space in equal amounts of time.

• Planets move about the Sun in an elliptical orbit with the Sun at one of the foci.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

This is a statement of which scientific law?

Object attract other objects with a force that is directly proportional to the product of their masses, and inversely proportional to the square of the distance between them.

• Kepler's 3rd Law

• Boyle's Law

• Kepler's 1st Law

• Newton's Law of Universal Gravitation