Book Name : The Earth : Our Habitat
Book Chapter Name : THE EARTH IN THE SOLAR SYSTEM
Q.1- What is celestial bodies?
Ans – The sun, the moon and all objects shinning in night in the sky are called celestial bodies.
Q.2- What is star?
Ans- Celestial bodies which have their own heat and light are called stars.
Q.3- What is constellation?
Ans- Various patterns formed by different groups of stars are called constellation.
Q.4- Write the name of some constellation?
Ans- Ursa Major or Big Bear is one such constellation and the most easily recognizable constellation is the small bear or Saptrishi.
Q.5- What is Pole Star?
Ans– The North star indicates the north direction it is also called Pole Star.
Q.6- What is planets?
Ans- Some celestial bodies do not have their own heat and light these are called planets.
Q.7- How far away The sun is from the earth ?
Ans- T he sun is about 150 million km away from the earth.
Q.8- Where is the sun in the solar system ?
Ans- The sun is in the centre of the solar system.
Q.9- Who are astronomers?
Ans- Those who study the celestial bodies and their movements are called astronomers.
Q.10- Who is the famous astronomer of ancient India?
Ans- Aryabhata was the famous astronomer of ancient India.
Q.11- Which is the orbits?
Ans- All planets move around the sun in fixed paths these paths are called orbits.
Q.12- Which planet is considered as ‘Earth’s-twins’?
Ans- Venus is considered as ‘Earth’s-twins’ because its size and shape are very much similar to the earth.
Q.13-Why the earth is called blue planet?
Ans- The earth appears blue because its two-thirds surface is covered by water so the earth called a blue planet.
Q14.-what is the name of earth’s satellite?
Ans-The moon is the earth’s only one satellite.
Q15.- How far away the moon is from the earth?
Ans- The moon is about 3,84,400 km away from the earth.
Q.16- Who was the first man reach on the moon?
Ans- Neil Armstrong was the first man to step on the moon on 29 July 1969.
Q.17- What is asteroids?
Ans- Apart from the stars, planets and satellites. There are numerous tiny bodies which also moved around the sun. These bodies are called asteroids.
Q.18- What is meteoroids?
Ans- The small pieces of rocks which move around the sun are called meteoroids.
Q.19- What is Galaxy?
Ans- Galaxy is a huge system of billions of stars and clouds of dust and gases
Q.20- What is universe?
Ans- There are millions of such galaxies that make the universe.
EXERCISES OF THE EARTH IN THE SOLAR SYSTEM
Tick the correct answer:
a- The planet known as the “Earth’s Twins” is
(i) Jupiter (ii) Saturn (iii) Venus
b- Which is the third nearest planet to the sun?
(i) Venus (ii) Earth (iii) Mercury
c- All the planets move around the sun in a
(i) Circular (ii) Rectangular (iii) Elongated path
d- The pole star indicates the direction to the
(i) South (ii) North (iii) East
e- Asteroids are found between the orbits of
(i) Saturn and Jupiter (ii) Mars and Jupiter (iii) The Earth and Mars
Ans-a-Venus b-Earth c-Elongated path d-North e-Mars and Jupiter
Fill in the blanks:
a- A group of ———— forming various patterns is called a ———–
b- A house 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 ———–
Ans- a- Stars, Constellation b- Galaxy c- The Moon d- Earth e- Heat, Light