Question

Which of the following statements about comets is true?
A.
Comets are mostly made up of rock. They are usually very easy to see but as they approach the Sun the rock condenses and becomes much harder to see.
B.
Comets are mostly made up of rock. They are usually very hard to see, but as they approach the Sun the rock heats up and becomes much easier to see.
C.
Comets are mostly made up of dust particles, frozen water and frozen gases. They are usually very hard to see, but as they approach the Sun these particles heat up and become much easier to see.
D.
Comets are mostly made up of dust particles, frozen water and frozen gases. They are usually very easy to see but as they approach the Sun these particles condense and become much harder to see.

Answer 1

Answer:

Option c is right.

Explanation:

C.

Comets are mostly made up of dust particles, frozen water and frozen gases. They are usually very hard to see, but as they approach the Sun these particles heat up and become much easier to see.

ex Halley's Comet which is once seen in 76 years

Answer 2

The correct statement about comets is: C. Comets are mostly made up of dust particles, frozen water and frozen gases. They are usually very hard to see, but as they approach the Sun these particles heat up and become much easier to see.

What are comets?

• Comets are small celestial bodies of the solar system that are usually made up of icy volatile gases, icy water and dust particles.
• As they are small, it is very difficult to see them. But, when they come near the sun, they warm and then vaporize. This converts the solid constituents of comets directly into gases and makes them visible.