Astronomy Test

About 13-18 billion years ago scientists believe that the universe began from a single point, and has been expanding from that point ever since.
The statement above describes the-

• The Lorentz Force Theory

• The Big Bang Theory

• The Big Crunch Theory

• The Stellar Nebula Theory

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Which block do you have me for science?

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About 13-18 billion years ago scientists believe that the universe began from a single point, and has been expanding from that point ever since. The statement above describes the-

• The Lorentz Force Theory
• The Big Crunch Theory
• The Stellar Nebula Theory
• The Big Bang Theory

Which of these facts is the best supporting evidence that the universe is expanding?

• The galaxies are moving away from each other.
• The stars vary in chemical composition.
• The galaxies can spin to form eddies.
• The universe is filled with galaxies of different sizes.

According to astronomers, the age of the universe is estimated to be closest to -

• 1.3 billion years
• 4.6 billion years
• 13. 8 billion years
• 7.8 billion years

The diagram below represents the light spectra given off by the same element as observed under two different conditions. Spectrum A was observed when that element was heated in a laboratory. Spectrum B shows the same element as seen in the light from a distant star. The light spectrum observed from this distant star shows a -

• red shift, which indicates that the star is moving away from Earth
• red shift, which indicates that the star is moving toward Earth
• blue shift, which indicates that the star is moving away from Earth
• blue shift, which indicates that the star is moving toward Earth

Which information best supports the inference that the universe began with an explosion?

• measurements of rates of decay using carbon-14
• measurements of cosmic background microwave radiation
• calculations of the distance from the Sun to each asteroid in the asteroid belt
• calculations of the temperature and luminosity of stars

Scientists who proposed the Big Bang Theory were attempting to explain

• the origin of the universe
• why stars have different luminosities
• the formation of our solar system
• how Earth’s atmosphere evolved