Chapter – 1
The Earth in the Solar System
Took revision of Ch – 1.
A – Answer the following questions :-
Q1. How does a planet differ from a star?
Ans – Some celestial bodies are very big and hot. They are made up of gases. They have their own heat and light, which they emit in large amounts. These celestial bodies are called stars.
Whereas , some celestial bodies do not have their own heat and light. They are lit by the light of the stars. Such bodies are called planets. The word ‘ planet ‘ comes from the Greek word ” Planetai ” which means ‘ wanderers ‘ .
Q2. What is meant by the ‘ Solar System ‘ ?
Ans – The sun , eight planets , satellites and some other celestial bodies known as asteroids and meteoroids form the Solar System.
Q3. Name all the planets according to their distance from the sun.