The Universe Practice Test

How long after the big bang did the first stars appear?

• 380,000 years

• 100 million years

• 250 million years

• 28,000 years

• 500 million years

The rapid expansion of the universe is called cosmic ___.

• expansion

• deflation

• inflation

• radiation

Process in which the nuclei or two more atoms combine to make a single, larger atom

• nucleosynthesis

• red shift

• nuclear fission

• nuclear fusion

If two carbon atoms combined in nuclear fusion, what atom would be formed?

• magnesium

• beryllium

• helium

• oxygen

All of the elements on Earth come from ___

• the sun

• nucleosynthesis

• black holes

• expoding stars

• the Milky Way

If three hydrogen atoms combined during nuclear fusion, a ____ atom would form.

• lithium

• beryllium

• carbon

• helium

Why do stars give off light?

• It comes from the energy given off during nuclear fusion.

• It comes from the energy given off during nucleosynthesis.

• they are constantly exploding

• they give off CMB radiation

The heaviest element that can be made during nuclear fusion in stars is ___.

• lead

• iron

• helium

• gold

How far is our Sun from the center of the Milky Way?

• 250 million miles

• 28,000 light years

• 28, 000 miles

• 100 million miles

• 5.88 trillion miles

Scientists estimate that it takes ___ years for our solar system to make a complete rotation around the Milky Way.

• 28000 light years

• 250 million years

• 5.88 trillion years

• 47 quadrillion years

• 100 million light years