What's that space rock?

What happens to comets when they come close to the sun?

• They heat up and spew dust and gases.

• They freeze and become solid.

• They break apart into smaller pieces.

• They stop moving.

What is the nucleus of a comet composed of?

• Icy chunks and frozen gases with bits of embedded rock and dust.

• Only rock and dust.

• Only frozen gases.

• Only icy chunks.

Where do most dwarf planets originate from?

• The Kuiper Belt beyond Neptune.

• The Asteroid Belt between Mars and Jupiter.

• The Oort Cloud.

• The inner solar system.

What is the size range of asteroids?

• From about 900 kilometers to less than 1 kilometer in diameter.

• From about 1000 kilometers to 10 kilometers in diameter.

• From about 500 kilometers to 5 kilometers in diameter.

• From about 200 kilometers to 2 kilometers in diameter.

What are meteors commonly known as when they streak across the sky?

• Shooting stars.

• Comets.

• Asteroids.

• Dwarf planets.