Question 1

Question 1:

Accepted Answer

Step-by-step solution provided.

Question 2

Question 1: Arrange the events given below in chronological order. (a) Water bodies appeared on the earth’s surface. (b) The sun and the planets revolving around it were created. (c) Protozoa

Accepted Answer

(a) An enormous cloud of hot gases and dust formed in space. (b) The sun and the planets were formed. (c) Water bodies appeared on the earth’s surface. (d) Protozoa appeared in water

Question 3

Question 1: Make a model of the solar system using balls of different sizes. Project : Question 1. Visit a zoo or make a list of animals which are seen in your neighbourhood and note their cha

Accepted Answer

Answer each question in one sentence : Question 1. When did the formation of the earth begin? Answer: On the basis of scientific research, it is believed that the formation of earth came into being around 4.5 billion years ago.

Question 4

Question 2: On the onset of creation, what was first formed?

Accepted Answer

An enormous cloud of very hot gases and dust spinning at a great speed was formed in space.

Question 5

Question 3: How were the sun and planets formed?

Accepted Answer

The circular motion of the great cloud caused it to divide into several portions thus creating the sun and planets.

Question 6

Question 4: Name the planets in our solar system.

Accepted Answer

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

Question 7

Question 5: What forms the solar system?

Accepted Answer

The sun and planets which revolve around the sun forms the solar system.

Question 8

Question 6: Which is the only planet where life is known to exist?

Accepted Answer

The Earth is the only planet where life is known to exist

Question 9

Question 7: How many years did it take for the surface of the Earth to get cooled?

Accepted Answer

After the creation of the Earth, it took about 80 crore years for its surface to cool down and for water bodies to be formed on it.

Question 10

Question 8: What kind of living organisms appeared first? What are they known as?

Accepted Answer

Various kinds of unicellular organisms or living things first appeared in water, they are known as ‘Protozoa’.

Question 11

Question 9: When did the multicellular living organisms appear?

Accepted Answer

After the creation of unicellular organisms in water, gradually, multicellular living organisms developed from the unicellular ones.

Question 12

Question 10: State the main characteristics of animals in which young ones are born.

Accepted Answer

Animals of some species lay eggs and their young ones are bom out of an egg. While in some other species, a mother gives birth to their young ones.

Question 13

Question 11: Which planets revolve around the sun?

Accepted Answer

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune are the planets that revolve around the sun.

Question 14

Question 15: How many years ago was the cloud formed in space?

Accepted Answer

The cloud was formed in space about 4-5 billion years ago

Question 15

Question 1: How did life develop on Earth? Or What was the origin of life on earth?

Accepted Answer

Step-by-step solution provided.

Question 16

Question 1: Visit a zoo or make a list of animals which are seen in your neighbourhood and note their characteristics. Environmental Studies Part 2 Standard 5th

Accepted Answer

s Chapter 3 Life on Earth Additional Important Questions and Answers

Question 17

Question 1: When did the formation of the earth begin?

Accepted Answer

On the basis of scientific research, it is believed that the formation of earth came into being around 4.5 billion years ago. Question 2 Maharashtra Board Solution On the onset of creation, what was first formed? Solution & Step-by-Step Answer: An enormous cloud of very hot gases and dust spinning a

Chapter 3 Life on Earth Solutions