1What is the solar system? How many planets are there in it? Make a list.
2Write any three characteristics of the planet Earth.
3Write the difference between a star and a planet.
4Write the difference between an inner planet and an outer planet.
5Which celestial body did the IAU decide to remove from the list of planets, and why?
6What is an asteroid? Where are they found, and give examples.
7Mercury is nearer the sun than Venus, so why is Venus the hottest planet?
8Why are the four inner planets rocky and the four outer planets gaseous?
9Which planet has a day longer than its year? Explain using the table.
10The book says Jupiter orbits the sun at the fastest speed. Check that against the table.