Learning About the Universe

 This type of galaxy appears to have arms that twist outward like pinwheels

• quasar

• spiral

• elliptical

• irregular

These are active, young with black holes at their center. Gas spins around the black hole, heats up and glows

• quasar

• elliptical

• spiral

• irregular

What is the substance that astronomers think is causing the expansion of the Universe to accelerate?

• dark matter

• big bang

• dark energy

• nebula

This is believed to make up 90% of the Universe. It does not give off electromagnetic radiation

• star clusters

• dark matter

• quasar

• dark energy

Explain Hubble's Law about the movement of galaxies.

• The farther away a galaxy is, the faster it moves.

• The farther away a galaxy is, the slower it moves.

• The larger a galaxy is, the faster it spins.

• The larger a galaxy is, the slower it spins.

About how many galaxies are there in the universe?

• billions

• millions

• thousands

A system of stars, gas, dust, and dark matter bound together by gravity is called ---

• an asteroid

• a nebula

• a galaxy

• a moon

Tags

NGSS.MS-ESS1-2

What do scientists call these massive systems?

• Solar Systems

• Nebulae

• Galaxies

• Planetary Systems

Tags

NGSS.MS-ESS1-2

Which galaxy is the largest in the local group?

• Milky Way

• Andromeda

• Triangulum

• Le Gentil

Tags

NGSS.MS-ESS1-2

NGSS.MS-ESS1-3

The Hubble Space Telescope recently provided and image that led to the discovery of a galaxy 13.2 billion light-years from earth. Which of the following statements about the newly discovered galaxy is most likely true?

• the galaxy is smaller than the sun

• the galaxy is within a solar system

• The galaxy is composed of billions of stars

• The galaxy is smaller than a star