Big Bang And Red Shift
Questions and Answers
- 1.
When was all the matter in the Universe concentrated into a single incredibly tiny point
- A.
16.8 trillion ago
- B.
2 years ago
- C.
13.7 billion ago
- D.
14.8 billion ago
Correct Answer
C. 13.7 billion agoExplanation
The correct answer is 13.7 billion years ago. This is based on the widely accepted scientific theory of the Big Bang, which states that the universe began as a singularity, a point of infinite density and temperature. Approximately 13.7 billion years ago, this singularity began to rapidly expand, leading to the formation of all matter and the universe as we know it today.Rate this question:
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- 2.
Does the sun contain helium
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The sun does contain helium. Helium is one of the main elements present in the sun's composition. It is formed through nuclear fusion processes in the sun's core, where hydrogen atoms combine to form helium. This process releases a tremendous amount of energy and is responsible for the sun's heat and light. Helium is also found in the sun's outer layers and is constantly being produced and replenished through the sun's ongoing fusion reactions. Therefore, it is accurate to say that the sun contains helium.Rate this question:
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- 3.
All the galaxies are moving_______ from us
Correct Answer
awayExplanation
The correct answer is "away" because the phrase "from us" indicates the direction of movement. Since all the galaxies are moving away from us, it suggests that the universe is expanding. This is supported by the observation of redshift in the light emitted by distant galaxies, which indicates that they are moving away from us at increasing speeds.Rate this question:
- 4.
The further away a galaxy is, the _______ it is moving away.
Correct Answer
fasterExplanation
As per the question, the further away a galaxy is, the answer is "faster" it is moving away. This is due to the concept of the expansion of the universe. According to Hubble's law, galaxies are moving away from each other, and the rate of this movement increases with distance. This phenomenon is explained by the expansion of space itself, causing galaxies to move apart at a faster pace the further they are from each other.Rate this question:
- 5.
What is the Universe?
- A.
All the substance in the solar system
- B.
All the substance in our Galaxy
- C.
Everything that exists
- D.
The Earth and the Moon together
Correct Answer
C. Everything that existsExplanation
The correct answer is "Everything that exists." This answer encompasses all aspects of the universe, including the substance in the solar system, our galaxy, and even beyond. It implies that the universe is not limited to just a specific region or celestial bodies, but rather encompasses all matter, energy, and space that exist.Rate this question:
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- 6.
Scientists have also detected a cosmic microwave background radiation or CMBR. This is received from all parts of the Universe and is thought to be the heat left over from the original explosion.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The explanation for the given correct answer is that scientists have indeed detected a cosmic microwave background radiation (CMBR) which is received from all parts of the Universe. This radiation is believed to be the residual heat from the initial explosion that created the Universe. Therefore, the statement "Scientists have also detected a cosmic microwave background radiation or CMBR. This is received from all parts of the Universe and is thought to be the heat left over from the original explosion" is true.Rate this question:
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- 7.
What does Red shift tell us?
- A.
Red things get hotter
- B.
Hot things get redder
- C.
The object is moving slowly towards us
- D.
The object is moving quickly away from us
Correct Answer
D. The object is moving quickly away from usExplanation
The red shift phenomenon refers to the observation that light from distant objects in space appears to be shifted towards longer (redder) wavelengths. This is a result of the Doppler effect, where the wavelength of light is stretched as an object moves away from the observer. Therefore, the correct answer is that the object is moving quickly away from us.Rate this question:
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- 8.
How the universe might end depends on...?
- A.
The temperature of the stars
- B.
The amount of mass present
- C.
The colour of the stars
- D.
The amount of trees on mars
Correct Answer
B. The amount of mass presentExplanation
The amount of mass present determines how the universe might end because it influences the gravitational forces at play. If there is enough mass, the universe could collapse under its own gravity in a "Big Crunch" scenario. On the other hand, if there is not enough mass, the universe may continue to expand indefinitely, leading to a "Big Freeze" or "Heat Death" scenario. The temperature and color of stars, as well as the amount of trees on Mars, do not directly affect the fate of the universe.Rate this question:
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- 9.
Why is the light from distant galaxies red shifted?
- A.
They produce more red light than nearby galaxies.
- B.
They are moving away from us
- C.
Because light in outer space is red
- D.
The longer wavelengths are filtered out by dust
Correct Answer
B. They are moving away from usExplanation
The light from distant galaxies is red shifted because they are moving away from us. This is known as the Doppler effect, where the wavelength of light appears longer when the source is moving away from the observer. As the galaxies move farther away, the light waves get stretched, causing them to shift towards the red end of the spectrum. This phenomenon provides evidence for the expansion of the universe.Rate this question:
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- 10.
All the matter in the universe was concentrated into a single incredibly ______ point
Correct Answer
tinyExplanation
The correct answer is "tiny" because the question states that all the matter in the universe was concentrated into a single point. The word "tiny" accurately describes the size of this point, suggesting that it was extremely small.Rate this question:
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