2024 Unit 1 Pretest

What process releases energy in stars by combining smaller elements into larger elements?

What produces energy in main sequence stars?

• Fusion of lighter nuclei into heavier nuclei

• Fusion of heavier nuclei into lighter nuclei

• Absorption of the cosmic microwave background

• Release of the cosmic microwave background

Which color of light has the shortest wavelength?

• Red

• Yellow

• Blue

• Violet

If the spectral lines of a galaxy are shifting red, that means it is moving...

• Towards Earth

• Away from Earth

• Back and forth

• Not at all

Select the two pieces of evidence that support the theory that the universe is expanding.

• The existence of nuclear fusion

• The existence of the cosmic microwave background

• The red shift of light from distant stars

• The blue shift of light from distant stars

According to the Big Bang Theory, our universe must have been __________ and _______________ in the past

• larger; hotter

• smaller; hotter

• larger; colder

• smaller; colder

What are the two most common found elements in the Universe?

• Silver and Gold

• Carbon and Oxygen

• Hydrogen and Helium

• Lithium and Iron

Which element in the chart is most likely the "Unidentified Element"?

• Element L

• Element M

• Element X

• Element Z

Betelgeuse is a supergiant. What element is Betelgeuse likely to produce BEFORE it goes supernova?

• Hydrogen

• Helium

• Iron

• Uranium

Which of the following is NOT a piece of evidence supporting the Big Bang Theory?

• The universe is expanding

• The cosmic microwave background

• The abundance of light elements in the universe

• The existence of nuclear fusion