Earth is the third planet from the sun and the only planet to have an atmosphere containing free oxygen, oceans of water on its surface and life. In the solar system, Earth is the fifth largest of the planets. The Sun, the eight planets and their moons, smaller planetary objects such as dwarf planets, comets and meteoroids together make up our solar system. In this article, we have compiled NCERT Solution for Class 6 Social Science, which contains the solution to the exercise given in the textbook of Geography. These solutions are easy to understand and will prepare you for the upcoming exam.
Intext Question, Page - 5
Q. What do animals and plants require in order to grow and survive ?
Answer:
The animals and plants require solar energy, air and water in order to grow and survive.
Textbook Exercises
1. Answer the following questions briefly.
(a) How does a planet differ from a star ?
Answer:
Stars :
- Stars emit a large amount of heat and light.
- They are big heavenly bodies.
- There are many stars which we cannot see with our naked eyes.
- They do not have heat and light of their own. They only reflect the light of the sun.
- Planets are called 'Wanderers' because they revolve around the sun in their fixed orbits.
- Planets can be seen with the help of the telescope.
Answer:
The sun, the planets and satellites together with other minor bodies make up the solar system. The sun is at the centre of the solar system. The planets revolve around the sun in their fixed orbits. The satellites revolve around the planets.
(c) Name all the planets according to their distance from the sun.
Answer:
The planets according to their distance from the sun are :
Mercury, Venus, Earth, Mars Jupiter, Saturn, Uranus, Neptune, Pluto.
(d) Why is the Earth called a unique planet ?
Answer:
Earth is called a unique planet because
- Conditions favourable to support life are found only on the earth; it is neither too hot nor too cold.
- Earth has surface water, which is very necessary for our survival.
- It has life giving oxygen and the ozone layer, which protect us from the harmful rays of the sun.
Answer:
The moon revolves round the earth in about 27 days. It takes exactly the same time to rotate on its axis. To complete both the movements, the moon takes the same time. This is the reason why we see only one side of the moon.
(f) What is the Universe ?
Answer:
The universe is the whole body of stars, planets, satellite and gases. It is endless. Stars are huge bodies of glowing gases e.g. sun. Planets and satellites do not have heat and light of their own. They are lit by the light of the stars.
2. Tick the correct answer.
(a) The planet known as the "Earth's twin" is
(i) Jupiter (ii) Saturn (iii) Venus
Answer:
(iii) Venus
(b) Which is the third nearest planet to the sun ?
(i) Venus (ii) Earth (iii) Mercury
Answer:
(ii) Earth
(c) All the planet move around the sun in a
(i) Circular path (ii) Rectangular path (iii) Elongated path
Answer:
(iii) Elongated path
(d) The pole star indicates the direction to the
(i) South (ii) North (iii) East
Answer:
(ii) North
(e) Asteriods are found between the orbits of
(i) Saturn and Jupiter (ii) Mars and Jupiter (iii) The Earth and Mars
Answer:
(ii) Mars and Jupiter
3. Fill in the blanks.
(a) A group of ________ forming various patterns is called a ________.
(b) A huge system of stars is called _________.
(c) _______ is the closest celestial body to our Earth.
(d) _______ is the third nearest planet to the sun.
(e) Planets do not have their own _________ and ________.
Answer:
(a) A group of stars forming various patterns is called a constellation.
(b) A huge system of stars is called galaxy.
(c) Moon is the closest celestial body to our Earth.
(d) Earth is the third nearest planet to the sun.
(e) Planets do not have their own heat and light.