Core Knowledge Astronomy Chapter 2

What is a galaxy?

• A single star with its planets

• A large planet

• A collection of stars and their solar systems, dust, and gas

• A type of spacecraft

How many galaxies may exist in all of space?

• 10 million

• 100 billion

• 1 billion

• 10 billion

What did the Voyager probes do as they traveled past planets?

• Landed on the planets

• Took pictures and sent them back to Earth

• Collected soil samples

• Destroyed asteroids

Which galaxy is our solar system a part of?

• Whirlpool Galaxy

• Andromeda Galaxy

• Milky Way Galaxy

• Sombrero Galaxy

What shape is the Milky Way galaxy?

• Ring

• Elliptical

• Irregular

• Spiral

What is the universe?

• A type of star

• A collection of solar systems

• All of the existing matter and energy in space

• A single galaxy

How old is the universe estimated to be?

• 4.5 billion years

• 10 billion years

• 13.77 billion years

• 20 billion years

What is a rover?

• A type of telescope

• A probe that can travel after landing

• A satellite

• A type of galaxy

What did the rovers Spirit and Opportunity discover on Mars?

• A watery surface and warmer climate in the past

• Evidence of life

• New types of rocks

• A new planet

What is a probe?

• A human-made satellite

• A type of star

• A spacecraft that sends information back to Earth

• A type of galaxy