We 'n' Our Society - 6.pdf - School Books Publishers India

2. Revolve round the sun. revolve round the planet.3. Earth is a planet. Moon is a satellite.2. A star and a planet.StarPlanet1. Stars twinkle. Planet do not twinkle.2. Stars have their own light. Planet recieve their light andheat from the sun.3. Stars are millions in number. Planets are eight in number.4. The sun is a star. Our earth is a planet.5. Stars are very big. Planets are comparatively verysmall to stars.3. Asteroids and meteors.AsteroidsMeteors1. Asteroids are small Meteors are brightplanets like solid objects. streaks of light.2. They may be broken These are shooting stars.pieces of a planet.3. Do not disappear. Disappear as gases.4. Constellation and galaxy.GalaxyConstellation1. Countless no of stars make The group of stars form a shape,a galaxy.called constellation.2. Our sun and stars belong to Great Bear or Saptrishi is thea galaxy known as Milky best example of a constellation.Way of Akash Ganga.E. Project / Activity :1. Make a model. Show the Moon revolving round the Earth and theEarth revolving round the Sun.Ans. (Do yourself)2. Draw a diagram showing the Solar system.Ans. (Do yourself)F. Short answer questions :1. What do you mean by Bigbang?Ans. It is believed that the universe came into being as a result of a hugeexplosion, called the Bigbang. This explosion took place billions ofyears ago.2. What is Milky Way?Ans. The Universe has countless number of galaxies. Our sun and starsbelong to a galaxy known as Milky Way or Akash Ganga.3. What does the word constellation mean?Ans. The group of stars form a shape, called constellation. Great Bear orSaptrishi is the best example of a constellation.4. How will you define Solar system?Ans. The family of the Sun is called the Solar system. The sun is the head ofthe Solar system. There are eight planets which go round it.3Horizon Press We 'n' Our Society – 6