The light from distant galaxies shows red-shift - AQA - GCSE Physics - Question 5 - 2019 - Paper 1
Question 5
The light from distant galaxies shows red-shift.
Complete the sentence.
The term red-shift describes the observed increase in the ___________________________ of th... show full transcript
Worked Solution & Example Answer:The light from distant galaxies shows red-shift - AQA - GCSE Physics - Question 5 - 2019 - Paper 1
Step 1
Complete the sentence.
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Answer
wavelength
Step 2
How does the Big Bang theory describe the universe when it began?
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Answer
The universe was extremely hot and dense at the beginning of its formation.
Step 3
Describe the relationship between the speed of a galaxy and the distance the galaxy is from the Earth.
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Answer
The speed of a galaxy is directly proportional to its distance from the Earth.
Step 4
Which of the following is the same as $6 \times 10^{12}$ terametres?
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Answer
6×1024 m
Step 5
Explain how the data in Figure 9 supports the suggestion that the universe began from a very small region.
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Answer
The data suggests that the furthest galaxies are moving the fastest, indicating that the universe is expanding from a very small region.
Step 6
What do the new observations suggest is happening to the universe?
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Answer
The universe is expanding at an ever greater rate.
Step 7
Give one reason why peer review is an important process.
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Answer
Peer review detects false claims.
Step 8
Describe how the wavelength and frequency of the light from Andromeda seem to have changed when viewed from the Earth.
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Answer
The wavelength of the light from Andromeda seems to have decreased, while the frequency appears to have increased.
