Question 1:

Balbharti Maharashtra State Board Class 5 Environmental Studies Solutions Chapter 1 Our Earth and Our Solar System Notes, Textbook Exercise Important Questions and Answers.

5th Std EVS 1 Digest Chapter 1 Our Earth and Our Solar System Textbook Questions and Answers

1. What’s the solution?

Question 2:

What’s the solution?
One of the asteroids have fallen out of its place in the asteroid belt and is hurling towards the sun. Our earth is in its way and there is all likelihood of a collision. What can be done to prevent this collision?

Answer:

Use the shock wave to deflect it away from earth. Which means attach three large remote controlled rockets to the asteroid turning it into a large space vehicle and move it away from a dangerous collision.

2. Use your Brain Power:

Question 3:

What will happen to our solar system if the sun were to suddenly disappear?

Answer:

1. If the sun were to suddenly disappear all life forms on earth will cease, because the sun is a source of light and heat.

2. There will be complete darkness on all planets.

3. The planets will move from their orbits and may clash against each other.

Question 4:

Suppose you want to give your address to a friend you have on the planet mars. How will you write your address if you want them to understand exactly where you live?

3. Look at the picture of the solar system and answer the following questions:

Answer:

Mercury

Question (b)

At what position is the earth from the Sun?

Question 5:

The heavenly bodies that twinkle are called ……………………. .
(a) earth
(b) moon
(c) stars

Answer:

(c) Stars

Question 6:

Satellites and planets get their light from the ……………….. .
(a) asteroids
(b) pluto
(c) sun

Answer:

(c) sun

Question 7:

The heavenly body closest to the earth is ………………. .
(a) sun
(b) moon
(c) mercury

Answer:

(b) moon

Question 8:

…………………….. is an important Indian space mission on Mars.
(a) Chandrayaan -1
(b) Mangalyaan
(c) Marsyaan

Answer:

(b) Mangalyaan

Question 9:

Scientists who travel in the spacecraft are called ……………….. .
(a) astronauts
(b) researchers
(c) engineers

Answer:

(a) astronauts

Question 10:

…………………. became the first Indian astonaut to go in space.
(a) Kalpana Chaivla
(b) Rakesh Sharma
(c) Sunita Williams

Answer:

(b) Rakesh Sharma

Question 11:

………………….. have their own light.
(a) Stars
(b) Planets
(c) Asteroids

Answer:

(a) Stars

Question 12:

The Sun is a …………………. .
(a) planet
(b) star
(c) satellite

Answer:

(b) star

Question 13:

The heavenly bodies that do not twinkle are called ………………. .
(a) planets
(b) stars
(c) rockets

Answer:

(a) planets

Question 14:

………………… do not have their own light.
(a) stars
(b) planets
(c) bulbs

Answer:

(b) planets

Question 15:

Plants get their light from the …………………… .
(a) rockets
(b) asteroids
(c) stars
(d) sun

Answer:

(c) stars

Question 16:

Our earth is a ………………….. .
(a) satellite
(b) moon
(c) planet

Answer:

(c) planet

Question 17:

The earth’s movement around the sun is called the ………………. of the earth.
(a) revolution
(b) rotation
(c) motion

Answer:

(a) revolution

Question 18:

Besides earth, there are ……………. other planets which revolves around the sun.
(a) two
(b) one
(c) seven

Answer:

(c) seven

Question 19:

The pathway along which the planets move around the sun is known as the planet’s
(a) track
(b) orbit
(c) asteroid

Answer:

(b) orbit

Question 20:

The sun and the planets that revolve around it are together called the ………………. system.
(a) satellite
(b) solar
(c) universal

Answer:

(b) solar

Question 21:

Some heavenly bodies that revolve around the planets are called ……………….. .
(a) sun
(b) moon
(c) satellites

Answer:

(c) satellites

Question 22:

The ………………….. revolves around the earth.
(a) sun
(b) moon
(c) planets

Answer:

(b) moon

Question 23:

The moon is the satellite of the ………………….. .
(a) Mars
(b) Saturn
(c) Earth

Answer:

(c) Earth

Question 24:

The planets revolve around the …………….. along with its satellites.
(a) earth
(b) sun
(c) solar system

Answer:

(b) sun

Question 25:

……………….. is a well-known dwarf planet.
(a) Pluto
(b) Jupiter
(c) Saturn

Answer:

(a) Pluto

Question 26:

Asteroids also ………………. around the sun.
(a) rotate
(b) move
(c) revolve

Answer:

(c) revolve

Question 27:

Due to the earth’s ………………….. all things on the earth remain on it.
(a) gravity
(b) rotation
(c) revolution

Answer:

(a) gravity

Question 28:

Very powerful rockets are used to send a spacecraft into ………………. .
(a) planets
(b) asteroids
(c) space

Answer:

(c) space

Question 29:

Our country is well-known for the development of its ……………… launch technology.
(a) Space
(b) Astronaut
(c) Asteroids

Answer:

(a) Space

Question 30:

Scientists who travel in spacecraft are called
(a) astronauts
(b) asteroids
(c) rockets

Answer:

(a) astronauts

What is the full form of:

Question 31:

M. O. M.

Answer:

Mars Orbit Mission

Question 32:

ISRO

Answer:

Indian Space Research Organisation

Question 33:

Match the following:

Question 34:

Answer:

Question 35:

Name the following:

Question 36:

Two heavenly bodies.

Answer:

The sun and the moon.

Question 37:

Planets in the solar system.

Answer:

Mercury Venus, Earth, Mars, Jupiter/Saturn, Uranus and Neptune.

Question 38:

Heavenly bodies between Mars and Jupiter.

Answer:

Asteroids.

Question 39:

A dwarf planet.

Answer:

Pluto.

Question 40:

Technology that helps us to travel in space.

Answer:

Rocket technology or space launch technology.

Answer the following in one sentence:

Question 41:

What is the solar system?

Answer:

The sun and their planets, their satellites, dwarf planets and asteroids that revolve around the sun are together called the solar system.

Question 42:

What is known as planet’s orbit?

Answer:

Every planet in the solar system revolves around the sun along a specific path which is known as planet’s orbit.

Question 43:

What are satellites?

Answer:

Some heavenly bodies which revolves around the planets are called satellites.

Question 44:

What do you mean by the force of gravity?

Answer:

All heavenly bodies exert a force of attraction or a pull on one another, this is called the force of gravity.

Question 45:

What are heavenly bodies?

Answer:

The sun, the moon, the stars, the planets, etc. are all heavenly bodies.

Question 46:

What are stars?

Answer:

Heavenly bodies that twinkle are called stars.

Question 47:

Which star is closer than any other star?

Answer:

The sun is the star that is closest to us.

Question 48:

What are planets?

Answer:

Heavenly bodies that do not twinkle are called planets.

Question 49:

What are the two movements of a planet?

Answer:

Planets revolve around a star, even as they rotate around themselves.

Question 50:

What is the revolution of the earth?

Answer:

The movement of the earth around the sun is called the revolution of the earth.

Question 51:

How many planets are there in our solar system?

Answer:

Our solar system has eight planets.

Question 52:

Name the planets of our solar system.

Answer:

The planets of our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.

Question 53:

Which is the satellite of the Earth?

Answer:

The moon is the satellite of the earth.

Question 54:

What are dwarf planets?

Answer:

Some smaller heavenly bodies that revolve around the sun are called dwarf planets.

Question 55:

Which dwarf planet is well-known?

Answer:

Pluto is a well known dwarf planet.

Question 56:

What are Asteroids?

Answer:

A band of numerous small heavenly bodies are called Asteroids.

Question 57:

Where are the Asteroids situated?

Answer:

The Asteroids are situated between the planets Mars and Jupiter.

Question 58:

Why do all the things on the earth remain on it?

Answer:

All things on earth remain on it, due to the earth’s gravity.

Question 59:

How do we send some object to space?

Answer:

To send some object from earth to space, it must be given power against the force of gravity.

Question 60:

Which technology is used to send objects into space?

Answer:

Rocket technology or space launch technology is used to send objects into space.

Question 61:

What are used to send a spacecraft into space?

Answer:

Very powerful rockets are used to send a spacecraft into space.

Question 62:

What is our country well-known for?

Answer:

Our country is well-known for the development of its space launch technology.

Question 63:

Who are astronauts?

Answer:

Some scientists who travel in spacecraft are known as astronauts.

Question 64:

Who was the first Indian astronaut to go into space?

Answer:

Rakesh Sharma was the first Indian astronaut to go into space in 1984.

Question 65:

Name two astronauts of Indian origin.

Answer:

Kalpana Chawla and Sunita Williams are two astronauts with Indian origin.

Give geographical reasons:

Question 66:

During the day we cannot see other stars, besides the Sun.

Answer:

1. The sun is a star.

2. It is closer to us than any other star.

3. It appears big and brilliant.

4. Therefore, due to its bright light during the day, we cannot see other stars.

Question 67:

The moon is called a satellite of the earth.

Answer:

1. We see the moon at night.

2. It revolves around the earth.

3. Therefore, it is called a satellite of the earth.

Question 68:

Our Earth is an invaluable planet.

Answer:

1. Space scientists have not yet been able to find a single other planet which has life on it.

2. Therefore, our planet is an invaluable planet.

Question 69:

Though the sun is a star it does not twinkle.

Answer:

1. The sun is a star and it is closer to us than any of the stars.

2. Hence, it appears big and brilliant and does not twinkle like the distant stars.

Question 70:

The moon appears to be very big.

Answer:

1. Compared to the sun, the other heavenly bodies in the solar system are much smaller.

2. As the moon is closest to the earth, it appears to be very big although it is actually very much smaller than the sun.

Question 71:

Satellites revolve around their planets.

Answer:

1. The sun exerts a gravitational pull on all planets whereas the tendency of the planets is to move away from the sun.

2. As a result of these two forces, a planet keeps revolving around the sun at fixed distance, in a fixed orbit.

3. In this way the satellites revolve around their planets.

Question 72:

Even if we throw something upward with a great force, it finally falls to the ground.

Answer:

1. All things on the earth remain on it due to the earth’s gravity.

2. So, even if we throw something upward with a great force, it finally falls back to the ground.

Answer briefly:

Question 73:

What happens to the spacecrafts after the mission is over?

Answer:

1. Some spacecraft remain in space.

2. Others are brought back to earth.

3. Some land on other planets or satellites after the mission is complete.

Question 74:

Describe Rakesh Sharma’s mission to space.

Answer:

1. Rakesh Sharma became the first Indian astronaut to go into space in 1984.

2. He spent eight days.

3. It was a joint mission of the ISRO and the Soviet Intercosmos.

4. Seeing India from space, he said it looked: ‘Saare jahan se achha’.

Question 75:

How are spacecraft launched into space?

Answer:

1. Very powerful rockets are used to send a spacecraft into space.

2. A tremendous quantity of fuel is burnt in these rockets so that the spacecraft weighing thousands of tons may be launched into space.

Question 76:

What are the uses of man-made satellites?

Answer:

1. Man-made satellites provide useful information for agriculture, environment, weather forecasting, map making and searching for water and mineral wealth on the earth.

2. They are also used for telecommunication.

Write short note on:

Question 77:

Dwarf planets

Answer:

1. Dwarf planets are smaller heavenly bodies that revolve around the sun.

2. The most well known is Pluto.

3. They revolve around the sun independently.

4. They have their own orbit.

Question 78:

Asteriods

Answer:

1. Small heavenly bodies between the planets Mars and Jupiter are called asteroids.

2. They move in a form of a band and are numerous.

3. They revolve around the sun.

Question 79:

Distinguish between stars and planets:

Answer:

Question 80:

Give details of Mangalyaan on the basis of the following points:
(a) Another name of Mangalyaan,
(b) Date of launch,
(c) Date of orbiting,
(d) Attempts made to achieve success,
(e) Type of mission,
(f) Objective of the mission.

Answer:

(a) Mass Orbit Mission

(b) 5 November 2013

(c) 24 September 2014

(d) one

(e) unmanned

(f) Deeper study of the moon and mass.

Question 81:

Through your observation:
In which direction do leaves from a tree, rocks from a hillside or rain from the sky fall?

Answer:

Due to earth’s gravity all things fall down to the ground.

Glossary: