What is Revolution?

• The spinning of Earth on its axis

• The movement of Earth around the Sun

• The movement of the Moon around Earth

• The rotation of the Sun

Types of energy with a __________ frequency have a short wavelength.

• Low

• Medium

• High

• Variable

What discovery did Kepler make about the planet's orbits?

• He discovered the planets orbit in a circular motion

• He discovered the planets orbit in an elliptical motion

• He discovered the planets orbit in a rectangular motion.

• He discovered the planets orbit in a triangular motion

Kepler's first law is about:

• the shape of the orbit

• the time it takes for a planet to orbit

• the distance or speed a planet orbits

• how fast a planet spins

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

• faster
• slower

Kepler's first law is about:

• the shape of the orbit

• the time it takes for a planet to orbit

• the distance or speed a planet orbits

• how fast a planet spins

What is Kepler's 2nd Law about?

• the shape of the orbits

• the speed or area an orbiting object travels

• the size of the orbit an object has

• the amount of time it will take for an object to orbit

Which explanation of the solar system best fits the observations of the planets and how they orbit the sun?

• The gravity of a large, massive star passing the sun ripped off blobs of material from it that formed the planets.

• A comet hit the sun and sent off fragments that became the planets.

• The planets formed at the center of a collapsing spinning cloud of gas and dust.

• The sun and planets formed from a collapsing spinning cloud of gas and dust.

When the Earth is tilted away from the Sun = ________________ seasons.

• Winter

• Summer

• Fall

• Spring

Kepler's 1st Law explains which of the following?

• The orbit of planets is an ellipse

• Planets further from the sun have an orbit that lasts MUCH shorter than planets that are close to the sun

• The planets have the same rotational period

• Planets have the same revolutional distance