Kepler's Laws.

Kepler's 2nd Law deals with 

• the shape of the planets' orbits
• the speed/area the planet travels 
• the length of time it takes the planet to orbit the sun

A planet moves __________ when it is farthest from the sun.

• faster
• slower

Kepler's first law states that the orbits of the planets are oval in shape or 

• ellipses
• perfect circles

The farther away a planet is from the sun, the _______ it takes it to orbit the sun once. 

• longer
• shorter

The path a planet travels around the sun is called its 

• orbit
• ellipse
• barycenter
• precession

What are the two factors that influence gravity the most?

• Mass and weight
• Weight and gravity
• Mass and distance
• Weight and distance

What is inertia?

• amount of atoms
• amount of gravitational pull
• the size
• resistance to a change in motion

How could you increase the inertia of an object?

• Add mass
• Remove mass

When do planets move the fastest?

• Close to the sun
• Far away from the sun

Why does weight change depending on the location?

• The mass of an object changes
• The gravitational pull changes
• The volume of the object changes
• Temperature changes