Name: ___________
Date: __________
Worksheet on the 3 Pieces of Evidence for the Big Bang Theory
Directions: Read each question carefully and write your answer in the space provided.
- What is the first piece of evidence for the Big Bang Theory?
Answer: The first piece of evidence for the Big Bang Theory is the cosmic microwave background radiation.
- What is the cosmic microwave background radiation?
Answer: The cosmic microwave background radiation is a faint glow of light that fills the entire universe. It is the leftover radiation from the Big Bang.
- How was the cosmic microwave background radiation discovered?
Answer: The cosmic microwave background radiation was discovered accidentally by two scientists named Arno Penzias and Robert Wilson in 1964. They were trying to use a radio telescope to study the Milky Way, but they kept picking up a strange noise that they couldn’t explain. After ruling out all other possible sources, they realized that the noise was coming from all directions in space and was the cosmic microwave background radiation.
- What is the second piece of evidence for the Big Bang Theory?
Answer: The second piece of evidence for the Big Bang Theory is the abundance of light elements in the universe.
- What are light elements?
Answer: Light elements are the elements that were formed in the first few minutes after the Big Bang. They include hydrogen, helium, and lithium.
- Why is the abundance of light elements evidence for the Big Bang Theory?
Answer: The abundance of light elements is evidence for the Big Bang Theory because it is consistent with the idea that the universe was once very hot and dense. During the first few minutes after the Big Bang, the temperature was high enough for nuclear fusion to occur, which created the light elements.
- What is the third piece of evidence for the Big Bang Theory?
Answer: The third piece of evidence for the Big Bang Theory is the redshift of galaxies.
- What is redshift?
Answer: Redshift is a phenomenon in which light from an object appears to be shifted towards the red end of the spectrum. It occurs when an object is moving away from us.
- How is the redshift of galaxies evidence for the Big Bang Theory?
Answer: The redshift of galaxies is evidence for the Big Bang Theory because it suggests that the universe is expanding. The farther away a galaxy is from us, the faster it is moving away, and the more its light is redshifted. This is consistent with the idea that the universe began as a single point and has been expanding ever since.
- Conclusion:
The Big Bang Theory is the most widely accepted explanation for the origin and evolution of the universe. The three pieces of evidence discussed in this worksheet - the cosmic microwave background radiation, the abundance of light elements, and the redshift of galaxies - all support the idea that the universe began as a single point and has been expanding ever since.
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