1. The Earth In The Solar System

Question 1

Describe the Poornima and amavasya cycle of the Moon.

Answer 1

Full moon: Once Cinema month, also called Purnima.
New Moon: Once in a month, also called Amavasya

Question 2

What is a constellation?

Answer 2

They are patterns formed by different groups of stars. Example: Ursa Major, Saptarishi et cetera.

Question 3

What is the pole star?

Answer 3

Also called the north star, it indicates the north direction. It remains at the same position in the sky. It can be located using the pointer Stars in the saptarishi constellation.

Question 4

What are the celestial bodies in the solar system?

Answer 4

The sun, the planets, the earth, the moon, asteroids, and meteoroids.

Question 5

Which planet is called earth’s twin?

Answer 5

Venus

Question 6

How far away is the Moon from Earth? What is the time period of revolution of the Moon around Earth? What is the time period of rotation of Moon about its own axis?

Answer 6

384400 km
27 days
27 days

Question 7

Where are asteroids found in the solar system?

Answer 7

Between the orbits of Mars and Jupiter.

Question 8

What is the difference between meteoroids and a meteor?

Answer 8

Meteoroids are rocks that move around the sun and Burn upon entering the earth atmosphere, giving a flash of light.
Meteors are rocks that reach and hit the Earth’s surface.