What is meant by the 'Solar System'?
Answer the following questions briefly.
(a) How does a planet differ from a star?
(b) What is meant by the ‘Solar System’?
(c)Name all the planets according to their distance from the Sun.
(d) Why is the Earth called a unique planet?
(e)Why do we see only one side of the Moon always?
(f) What is the Universe?
Explain briefly what is meant by environment.