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

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

• dark energy

• the age of the rocks on Earth

• the current motion of inner planets

• patterns of background radiation

Tags

NGSS.HS-ESS1-2

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 though blue shift

Tags

NGSS.HS-ESS1-2

Which evidence supports the big bang theory?

• planetesimals are formed 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?

• 5 million years ago

• 14 million years ago

• 5 billion years ago

• 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 of 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.MS-ESS1-2

Which statement accurately describes planetesimals?

• they are the origin of planets

• they formed from ice and rocks

• they were created during the big bang

• they contain 98% of matter in the solar system