Astronomers usually measure the distance between stars in ____.

• A. miles

• B. kilometers

• C. light-years

• D. astronomical units

Which statement about stars is true?

• About 10,000 stars are in the universe.

• About 10 million stars are in the universe.

• About 100 billion stars are in the universe.

• More stars are in the universe than we can count.

The stars that will burn the longest are usually the stars that are the ____.

• A. largest

• B. smallest

• C. brightest

• D. largest

What is the main reason to put a telescope in space?

• It is much closer to the stars.

• It can receive star light that cannot reach Earth.

• Light reaching it is not affected by the movement of air.

• It can detect objects behind the moon.

Tags

NGSS.HS-PS4-4

A scientist applies pressure to a rotating sphere of modeling clay, demonstrating how the sphere gradually becomes a disk with a dense center. Which of the following processes is the scientist most likely modeling?

• A. the formation of a spiral galaxy

• B. the formation of an elliptical galaxy

• C. the formation of interstellar matter

• D. the formation of Earth's sun and the bodies that orbit it

Tags

NGSS.HS-ESS2-1

Which number below most accurately describes the number of stars in the Milky Way?

• hundreds

• thousands

• millions

• billions

The big bang theory states that ____.

• A. galaxies are constantly formed by gigantic explosions

• B. the universe formed by the rapid expansion of space from a point 10-20 billion years ago

• C. the universe has always looked the same as it does now

• D. galaxies are constantly destroyed by gigantic explosions

Tags

NGSS.HS-ESS1-2

Which statement below best describes the composition of most elliptical galaxies?

• They contain mostly new stars with lots of gas and dust.

• They contain mostly old stars with lots of gas and dust.

• They contain mostly old stars with very little gas and dust.

• They contain very few stars.

The brightest, most distant objects we can see may be galaxies in the process of forming. These objects are known as ____.

• A. comets

• B. supernovas

• C. black holes

• D. quasars

What type of galaxy is our galaxy, the Milky Way?

• A. elliptical

• B. spiral

• C. inverted

• D. irregular

Tags

NGSS.MS-ESS1-2