# AP 6th Class Social Important Questions Chapter 1 Our Earth in the Solar System

These AP 6th Class Social Important Questions 1st Lesson Our Earth in the Solar System will help students prepare well for the exams.

## AP State Syllabus 6th Class Social Important Questions 1st Lesson Our Earth in the Solar System

Question 1.
Why can’t we see the Moon and stars during the daytime?
The bright light of the Sun does not allow us to see the moon and the stars during the daytime.

Question 2.
What are celestial bodies?
The Sun, the Moon, and all those objects shining in the night sky and other bodies like the Earth are called celestial bodies.

Question 3.
What is a star?
A celestial body that is made up of gases, and which has its own heat and light is called a star.

Question 4.
What is a planet? Give an example.
A celestial body that does not have its own heat and light and gets them from a star is called a planet. The Earth on which we live is a planet and gets heat And light from the Sun.

Question 5.
How many galaxies does Universe contain?
The universe contains millions of galaxies.

Question 6.
Who is the companion of the Earth?
Moon is the companion of the Earth.

Question 7.
What is called a solar system?
The sun, eight planets, satellites, and other celestial bodies like asteroids and meteoroids are together known as a solar system.

Question 8.
What is the source of light and heat in the solar system?
The source of light and heat in the solar system is the Sun.

Question 9.
What is the distance of the sun from the earth?
The sun is about 150 million kilometers away from the earth.

Question 10.
What is the speed of the light?
3 lakhs kilometers per second is the speed of light.

Question 11.
How much time light will take to travel from Sun to the Earth?
The light will take 8 minutes to travel from the Sun to the Earth.

Question 12.
How big is the Sun?
Sun can include 13 lakhs Earths in it.

Question 13.
What are Constellations?
Various patterns formed by different groups of stars in the sky are called Constellations.

Question 14.
What is Saptarshi?
Saptarshi is one of the constellations with a group of seven stars.

Question 15.
What is an orbit?
The fixed elongated path in which, all the 8 planets in the solar system move around the sun is called an orbit.

Question 16.
What are inner planets? What are they?
The planets nearer to the Sun are called inner planets: They are Mercury, Venus, Earth, and Mars.

Question 17.
What are outer planets? What are they?
The last four planets are called outer planets. They are Jupiter, Saturn, Uranus, and Neptune.

Question 18.
Which planet is called Earth’s twin? Why?
Venus is called Earth’s twin. Venus’s size and shape are very much similar to that of the earth. So it is called Earth’s twin.

Question 19.
Why Earth’s shape is described as a Geoid?
The Earth is slightly flattened at the poles and bulges in the middle. So Earth shapes in described as a Geoid.

Question 20.
Why earth Is called a blue planet?
Two third of Earth’s surface is covered by water. The earth appears blue from outer space. So the Earth is called a blue planet.

Question 21.
What are the realms of the Earth?
The lithosphere, hydrosphere, atmosphere, and biosphere are called the realms of the Earth.

Question 22.
What is the lithosphere?
The solid outer layer of the earth which consists of rocks and soils is called the lithosphere. It is the land we live.

Question 23.
What does the hydrosphere consist of?
Hydro means water. The hydrosphere consists of water bodies such as oceans, seas, rivers, lakes, and ice caps on mountains.

Question 24.
What is the atmosphere?
The atmosphere is the layer of air that surrounds the Earth. Major gases like Nitrogen (78%), Oxygen (21 %), Carbon dioxide, Hydrogen, Helium, Argon, and Ozone are present in the atmosphere.

Question 25.
What is the biosphere? What does it consist of?
All the living things that exist on the land, in the water, and in the air are together are called as Biosphere. The biosphere consists of plants animals, bacteria, and other tiny organisms.

Question 26.
What is a satellite?
A satellite is a celestial body that moves around the planets in the same way as the planets move around the Sun.

Question 27.
Name the planets that do not have satellites.
Mercury and Venus do not have any satellites.

Question 28.
What is the natural satellite of earth? Why moon appears big than other stars?
Moon is the natural satellite of the Earth. It appears so big because it is nearer to our planet than other celestial bodies.

Question 29.
What are the shadows on the moon?
Moon has mountains, plains, and depressions on its surface. These objects cast shadows, on the moon’s surface.

Question 30.
Expand ISRO.
Indian Space Research Organisation.

Question 31.
Expand SHAR.
Sriharikota High Altitude Range.

Question 32.
Who is Satish Dhawan?
Satish Dhawan is a scientist and the Former Chairman of the ISRO.

Question 33.
What are asteroids?
Apart from the stars, planets, and satellites, there are numerous tiny bodies which move around the sun are called asteroids.

Question 34.
What are meteoroids?
The small pieces of rocks which move around the Sun are called meteoroids.

Question 35.
What is a Comet? Name one famous Comet.
A comet is a celestial object made up of a head and a tail. Halley’s comet is one of the famous comets.

Question 36.
Explain Akash Ganga.
A cluster of millions of stars is called Akash Ganga.

Question 37.
Why do we not fee! the heat and light of the stars, even though they are so big and hot?
We do not feel the heat and light of the stars because they are very far away from us.

Question 38.
What is the shape of the orbits in which planets revolve around the sun?
The orbits of planets are elliptical or elongated in shape.

Question 39.
What is the difference between the moon and INSAT?
The moon is a natural satellite of the earth while INSAT is an artificial satellite.

Question 40.
Why do we only see one side of the Moon?
The moon is tidally locked to the earth. The moon’s rotation on its axis is exactly the same as its orbital time around the earth. So we can see only one side of the moon ever facing the earth.

Question 41.
Write a short note on the Sun.
The Sun is considered the head of the solar system. It is a star, although it is smaller and less bright than the other stars. It is a huge celestial body made up of extremely hot gases. It provides heat and light for the whole of the solar system. Life on the earth depends on many factors, and the sunlight is one of them. The Sun is about 150 million kilometers away from the earth.

Question 42.
Write a short note on the moon.
The moon is the only natural satellite of our planet earth. Its diameter is just about 14th of the earth’s diameter. It is comparatively closer to the earth than all other celestial bodies. It does not support life. It moves around the earth in about 27 days and rotates ’ about its own axis in 27 days only. So we can see one side of the moon only.

Question 43.
What is a comet? Write about Halley’s comet.
A comet is a celestial object made up of a head and a tail. Halley’s comet is one of the most famous comets. It comes close to the Earth every 76 years. It appeared in 1986 and will appear again in 2061.

Question 44.
All the celestial bodies spin in an anti-clockwise direction except two planets. What are they?
Venus and Uranus are the two planets that spin around in a clockwise direction.

Question 45.
From where does the earth get light and heat?
The earth gets light and heat from the Sun.

Question 46.
Who is the first man to step on the moon?
Neil Armstrong, an American was the first man to step on the surface of the moon on 21st July 1969.

Question 47.
Where is ISRO located?
Isro is located in Sriharikota in the SPSR Nellore district.

Question 48.
How did dead people in olden times determine the directions?
People in olden times determined directions with the help of stars.

Question 49.
Who determined the directions with the help of north star?
In the olden days, people in the northern hemisphere determined the directions with the help of the north star. With the help of the north star, they determine the north direction. It always remains in the same direction in the sky. It is also called the pole star.

Question 50.
What is the difference between Asteroids and Meteoroids?
Asteroids are large rocky objects in space, in orbit around the Sun. Meteoroids are much smaller rocks or particles in orbit around the Sun. Sometimes these Meteoroids come near the Earth and tend to drop upon it.

Question 51.
What exists between inner planets and outer planets?
 Name of the Planet One orbit around the sun One spin on the axis Mercury 88 days 59 days Venus 225 days 243 days Earth 365$$\frac{1}{4}$$ days 1 day Mars 687 days 1 day Jupiter 11 years, 11 months 9 hours, 56 minutes Saturn 29 years, 5 months 10 hours 40 minutes Uranus 84 years 17 hours, 14 minutes Neptune 164 years 16 years, 7 minutes.