Universe and Expansion

According to the big bang theory, which statement is accurate about how the universe came to be?

• It expanded slowly.

• It gradually warmed.

• Stars and galaxies formed.

• Atoms such as hydrogen were destroyed.

Tags

NGSS.HS-ESS1-2

Which object(s) formed last in our solar system?

• the Sun

• the solar nebula

• the inner planets

• the planetesimals

What can be observed only by observing its effects on gravity?

• dark matter

• a solar nebula

• gas and dust

• a planetesimal

Which statement describes Earth?

• It is an outer planet.

• It is a gaseous planet.

• It was formed from gas and dust.

• It has a thick atmosphere of hydrogen and helium.

What do scientists know about the future of the universe?

• what dark matter is made of

• why the expansion of the universe is accelerating

• that invisible matter must be influencing the rotation of galaxies

• that galaxies spin much slower than they should based on visible matter

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.

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.