Dark Energy

The unknown force or energy which tends to accelerate the expansion of the universe is called ___

• the faint force

• dark energy

• the shadow force

• black energy

We think there's enough dark energy in space to ensure the expansion will ___

• slow, stop, and then re-collapse

• slow then stop

• slow, but never quite reaches zero

• continue forever

In the 1990s, astronomers studying distant supernovae found that the expansion of the universe was ___

• indeterminable

• constant

• decelerating

• accelerating

Tags

NGSS.HS-ESS1-2

The Universe is expanding, and that expansion is ___

• getting faster every day

• getting slower every day

• randomly changing

• constant

Tags

NGSS.HS-ESS1-2

a type of energy that opposes gravity and causes the expansion of the universe

• dark energy

• dark matter

• electromagnetic

• accelerating

On large scales, all the galaxies we see are moving away from each other as space ___

• curves around them

• remains static

• contracts between them

• expands between them

Tags

NGSS.HS-ESS1-2

What percentage of the mass energy in the entire cosmos is dark energy?

• 33.8%

• 25%

• 50%

• 66.2%

What did two teams of astronomers discover in the late 1990s about the expansion of the universe?

• It is constant

• It is shrinking

• It is decelerating

• It is accelerating

Most of the universe is made of

• visible matter

• Invisible matter

• dark energy

• dark energy and dark matter

When was dark energy discovered?

• In the 1980s

• In the late 1990s

• In the 1970s

• In the early 2000s