Science, asked by paritoshg3, 6 months ago

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Answered by Aadhyagupta2
0

Answer:

  • Very simple.
  • What is the size of Sun and moon. Why they appear small from earth.
  • Same way aeroplane flying in sky appear small even size is way bigger. All this happened due to distance and angular view of field.
  • Same feeling you may get easily if you go to very high building and look down in the street, you will see, people height way smaller than actual height.
  • sun is a medium size star that appears larger and brighter than other stars because it is closer to us.
  • The key to it all is heat and lots of energy. The Moon formed after a collision between Earth and a proto-planet astronomers call Theia. And just after the smash up, there was lots of water vapor — enough that the Moon could’ve had a fairly substantial atmosphere and pools of water on the ground. Volcanic activity was also high, which could have replenished the atmosphere with water vapor from deep in the interior.
  • That all happened roughly 4 billion years ago.
  • And by the time volcanic activity settled down some 500 million years after the collision, the atmosphere couldn’t cling on — and much like Mars, the Moon dried up.
  • Kalpana Chawla, USA
  • Chawla became the first woman of Indian descent to go into space, although she was with NASA. She was one of the seven members on the ill-fated space shuttle Columbia, which disintegrated upon atmospheric entry, killing all seven in 2003.

Explanation:

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Answered by Anonymous
6

Answer:

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  1. Explanation:

sulphate

(iv) KNO3 – Potassium nitrate

(v) CaCO3 – Calcium carbonate

3. What is meant by the term chemical formula?

Solution:

  1. ...Chemical formula is the symbolic representation of a chemical compound. For example: The
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