Units 2-5

What is the Big Bang?

• A theory about the end of the universe

• A theory about the beginning of the universe

• A type of star

• A type of galaxy

What did Edwin Hubble discover about galaxies?

• They are stationary

• They are moving away from us

• They are moving towards us

• They are shrinking

What was the universe like at the very beginning?

• Hot and large

• Cold and tiny

• Hot and tiny

• Cold and large

How old is the universe according to the text?

• 15.8 billion years

• 11.8 billion years

• 13.8 billion years

• 9.8 million years

What happens as the universe expands?

• It heats up

• It cools down

• It stays the same temperature

• It becomes denser

Which astronomer believed that the Earth was at the center of the universe?

• Ptolemy

• Galileo

• Copernicus

• Newton

Which astronomer developed the theory of gravity?

• Ptolemy

• Hubble

• Leavitt

• Newton

Which astronomer began to question the geocentric model of the universe and believed the Sun was at the center of the universe?

• Copernicus

• Hubble

• Ptolemy

• Newton

Which astronomer determined that stars closer to Earth appeared brighter while stars farther away are dimmer?

• Newton

• Hubble

• Leavitt

• Copernicus

Which astronomer designed a telescope to observe the moons of Jupiter?

• Ptolemy

• Copernicus

• Hubble

• Galileo