The Expanding Universe

Which is one piece of information that astronomers use to calculate the age of the universe?

• dark energy

• the age of rocks on Earth

• the current motion of inner planets

• patterns of background radiation

Which is one of Edwin Hubble’s findings that supports the big bang theory?

• The universe started at a central point.

• Planetesimals formed in debris disks.

• Visible matter only makes up about 5% of the universe.

• The Milky Way is the only galaxy in the universe.

Tags

NGSS.HS-ESS1-2

Which statement accurately describes the Doppler effect?

• It was used by Hubble to measure velocities of galaxies.

• It indicates galaxy motion through changes in sound waves.

• It indicates a galaxy moving toward Earth through red shift.

• It indicates a galaxy moving away from Earth through blue shift

Tags

NGSS.HS-ESS1-2

Which evidence supports the big bang theory?

• Planetesimals form in debris disks.

• Most galaxies are moving toward us.

• Uniform background radiation is detected in every direction

• Galaxies spin faster than they should based on visible matter.

Tags

NGSS.HS-ESS1-2

About how long ago did our solar system start to form?

• About 5 million years ago

• About 14 million years ago

• About 5 billion years ago

• About 14 billion years ago

Tags

NGSS.HS-ESS1-6

Which event led to the formation of our solar system?

• A galaxy broke apart.

• A massive star exploded.

• A solar nebula collapsed.

• Dark matter materialized.

In which order did the events forming our solar system occur?

• The solar nebula became hot and dense pulling in more gas. This flattened into a rotating disk. It spun faster and faster, forming the Sun.

• Gas was pulled toward the center, forming the Sun. Gas flattened into a rotating disk and became hot and dense, forming a solar nebula that spun faster and faster.

• Gas flattened into a rotating disk and became hot and dense, forming a solar nebula that spun faster and faster. Gas was pulled toward the center, forming the Sun

• The solar nebula spun faster and faster and flattened into a rotating disk. Most of the gas was pulled toward the center, where it became hot and dense, forming the Sun.

Tags

NGSS.HS-ESS1-6

Which statement accurately describes planetesimals?

• They are the origins of planets.

• They formed from ice and rocks.

• They were created during the big bang.

• They contain 98% of matter in the solar system.

Which planet formed near the Sun where the solar system’s temperatures were very high?

• Mars

• Jupiter

• Neptune

• Saturn

Which statement accurately describes the inner planets?

• Uranus is one of the inner planets.

• The inner planets formed when the solar system cooled.

• The inner planets are also called terrestrial planets

• The inner planets are larger than the outer planets.