Question

1. What is constellation?
2. What is meant by scattering of light?
8. How are sound produce?
4. What are the important ingredients of toothpaste? What are the
functionsof them?​

Answer 1

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• A constellation is a group of stars which make up imaginary outline or pattern in the night sky.

• Scattering of light is the phenomenon in which light rays get deviated from its straight path on striking an obstacle like dust or gas molecules, water vapours etc.

• Sound is produced when an object vibrates, creating a pressure wave.

• The important ingredients of a toothpaste are abrasives, water and fluoride. Abrasives such as calcium carbonate and calcium hydrogen phosphates help to remove the dirt on teeth and also helps to polish them. Fluoride is the most common active ingredients used to prevent decay of our teeth. It helps in strenghtening of bones and the enamel which covers the teeth.

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Answer 2

Answer:

a.constellation is an area on the celestial sphere in which a group of visible stars forms a perceived outline or pattern, typically representing an animal, mythological person or creature, or an inanimate object.

Explanation:

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