The Expanding Universe

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

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 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.

Which statement accurately describes the outer planets?

• Pluto is one of the outer planets.

• The outer planets are also called rocky planets.

• The outer planets have thin atmospheres.

• The outer planets have a high gravity due to their large size.

Which two objects in space formed from the huge disk of ice and debris beyond the outer planets?

• Pluto and comets

• comets and Neptune

• Neptune and a solar nebula

• a solar nebula and planetesimals

Which is currently the most supported theory about the future of the universe?

• The universe could remain exactly as it is today.

• The universe may continue to expand.

• Stars could burn out, causing the universe to become dark and cold.

• Gravity could pull galaxies back together, causing a reverse of the big bang.

In 1998, scientists discovered that the expansion of the universe has been accelerating.

What force is causing this phenomena?

• dark energy

• Hubble’s law

• the Doppler effect

• background radiation