3/12/25

the Big Bang Theory is that the universe started with a ___.

• black hole
• explosion heard throughout the universe

• single point of energy

• cosmic wave

Which is evidence that the universe is spreading?

• Redshift of light from distant galaxies.

• The presence of dark matter in distant galaxies.

• The temperature of the cosmic microwave background.
• The brightness of stars light.

the more that the spectral lines of a star are shifted to the red end of the spectrum

• The star is moving towards us.
• The star is stationary.
• The star is moving away from us.
• The star is experiencing a blue shift.

Which of the following are important in identifying the composition of a star? (Select 2)

• A spectrometer breaks light into its different wavelengths (spectral lines)

• Stars can be red shifted or blue shifted

• Each element has a unique pattern of spectral lines.

• The universe is expanding.

A radio telescope is __.

• A radio telescope is used for measuring light from stars.
• A radio telescope is an instrument for detecting radio waves from astronomical sources.
• A radio telescope is a device for listening to music.
• A radio telescope is an instrument for capturing images of planets and stars.