4.06 Galaxies

The universe is made up of __________.

Which phrase best completes the sentence?

• one galaxy

• several galaxies

• thousands of galaxies

• no galaxies

Answer explanation

Watch this video to find the answer!

Which number best describes the number of stars you would find in a galaxy?

• hundreds

• thousands

• millions

• billions

Answer explanation

Watch this video to find the answer!

Which kind of galaxy has arms of gas and dust?

• spiral galaxy

• elliptical galaxy

• irregular galaxy

• bar galaxy

Answer explanation

Read the diagram to help you answer!

Which category of galaxy does not have a distinctive shape?

• a spiral galaxy

• an elliptical galaxy

• a barred-spiral galaxy

• an irregular galaxy

Answer explanation

Read the diagram to help you answer!

Which unit is used to measure the distance between galaxies?

• kilometers

• years

• miles

• light years

Answer explanation

Read the chart and use it to help you answer!

Which statement best describes how galaxies exist in the universe?

• They spin within a few miles of each other.

• They exist together with no empty space in between them.

• They are evenly distributed throughout the universe.

• They form clusters that are light years away from other clusters.

Answer explanation

Watch this beautiful video about galaxies to help you answer!

The distance from the sun to Earth would be ___________.

Which phrase best completes the sentence?

• less than one light year

• exactly one light year

• more than one light year

• any number of light years

Answer explanation

Read this chart of help you answer!

Tags

NGSS.MS-ESS1-3

How long does it take for light from a star that is 8 light years away to reach Earth?

• 8 earth minutes

• 16 earth minutes

• 8 earth years

• 16 earth years

Answer explanation

Read the definition of a light-year to make the correct answer choice.