1.5 Kepler's Laws

Which of the following is FALSE about Kepler's Laws ?

• The path a planet takes around the sun is a square.

• The closer a planet is to the Sun, the faster it moves.

• The time it takes a planet to orbit depends on its distance from the sun.

• The farther a planet is from the sun, the slower it orbits.

Which object is always located at one focus of elliptical orbits?

• The Sun

• Earth

• A distant star

• Jupiter

According to Kepler's 2nd Law, Earth moves at what type of rate when it's in aphelion?

• Fastest

• Slowest

• Speed doesn't change

• Speeds up then slows down

According to Kepler's 3rd Law, what is the relationship between a planet's distance from the sun and the time it takes to orbit?

• The closer a planet is to the sun, the longer the orbit

• The closer the planet is to the sun, the shorter the orbit

• The further away the planet is to the sun, the shorter the orbit

• There is no correlation between the distance from the sun and the orbit

What happens to the shape of a planet's orbit as its eccentricity increases (gets closer to 1)?

• It starts out circular and becomes elliptical

• It becomes more circular

• It becomes more elliptical

• It doesn't change

How does distance affect gravity?

• The farther away objects are from each other, the more gravity they exert.

• The closer objects are to each other, the less gravity they exert.

• Gravity is not affected by distance.

• The farther away objects are from each other, the less gravity they exert.

What object is at the center of our solar system?

• The Earth

• Mars

• Pluto

• The Sun

What happens to the shape of a planet's orbit as its eccentricity decreases (gets closer to 0)?

• It starts out as circular and becomes elliptical.

• It becomes more circular.

• It becomes more elliptical.

• It doesn't change.

According to Kepler's 2nd Law, at what rate does the Earth move when it's at perihelion?

• Fastest

• Slowest

Which of Kepler's Laws does this diagram represent?

• 1st

• 2nd

• 3rd