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Consider the following pairs:

Objects in space: Description
1. Cepheids: Giant clouds of dust and gas in space
2. Nebulae: Stars which brighten and dim periodically
3. Pulsars: Neutron stars that are formed when massive stars run out of fuel and collapse
How many of the above pairs are correctly matched?
(a) Only one
(b) Only two
(c) All three
(d) None

Explanation:

  • Cepheids are actually stars that brighten and dim periodically. They are not giant clouds of dust and gas in space. So, the first pair is incorrectly matched.
  • Nebulae are actually giant clouds of dust and gas in space. So, the second pair is incorrectly matched.
  • Pulsars are neutron stars that are formed when massive stars run out of fuel and collapse. So, the third pair is correctly matched.
  • Therefore, only one of the above pairs is correctly matched. The correct answer is (a) Only one.
Inputs from Geography Mindmap Notes

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