Unit 4 Sem. 2

The big bang theory states that the universe is approximately _________.

Which number best completes the sentence?

• 14 billion years old

• 14 million years old

• 14 thousand years old

• 14 trillion years old

Which statement tells a result of the big bang?

• Galaxies are moving closer.

• Galaxies are moving farther away.

• Galaxies are stationary.

• Galaxies are moving randomly.

What is a cloud of dust and gas in space known as?

• an asteroid

• a nebula

• a galaxy

• a solar system

What did the solar system form from?

• preexisting planets

• comets

• black hole

• clouds of dust and gas

Which galaxy is called a barred-spiral galaxy?

• 
• 
• 
• 

Alpha Centuri is 4 light years from Earth.

How long would it take for light from Alpha Centuri to reach Earth?

• 4 Earth years

• 4 Earth months

• 4 Earth weeks

• 4 Earth days

Tags

CCSS.2.MD.A.3

What happens to the force of gravity between two masses if they are moved closer?

• It increases.

• It decreases.

• It stays the same.

• It fluctuates.

Which choice states the planet or planets that have an elliptical orbit around the sun?

• Mars

• Jupiter

• Earth

• Earth, Jupiter, and Mars

What separates Mars from Jupiter?

Responses

• sun

• Milky Way Galaxy

• asteroid belt

• black hole

What is caused by the tilt of the Earth on its axis?

• a year

• the seasons

• day and night

• a month