Text Book Back Questions and Answers - Chapter 1 - Our Earth - Term 1 - 5th Social Guide Samacheer Kalvi Solutions

You can Download the Text Book Back Questions and Answers - Chapter 1 - Our Earth - Term 1 - 5th Social Guide Samacheer Kalvi Solutions with expert answers for all chapters. Perfect for Tamil & English Medium students to revise the syllabus and score more marks in board exams. Download and share it with your friends

Share this to Friend on WhatsApp

Chapter 1 - Our Earth - Term 1 - 5th Social Guide Samacheer Kalvi Solutions - Text Book Back Questions and Answers

I. Fill in the blanks.

Question 1.
The distance between the earth and the sun is ______
Answer:
Nearly 150 Million Km

Question 2.
______ are caused due to revolution of the Earth.

Answer:
Seasons
Question 3.
The continent ________ is covered by ice

Answer:
Antarctica
Question 4.
The biggest continent is ______ 
Answer :
Asia
Question 5.

____________ is described as Red Planet.

Answer:
Mars

Question 6.

______________ Percentage of our earth is covered by salt water.

Answer :
$
71 \%
$
II. Match the Following

Answer:
1. (b)
2. (c)
3. (e)
4. (a)
5. (d)
III. Short Question and Answers:

Question 1.
What do you know about Universe?
Answer:
- The Universe is a vast expansion of space.
- The Universe consists of billions of galaxies, stars, planets, dwarf planets, comets, asteroids, meteoroids and natural satellites.
- The exact size of the universe is still unknown. Scientists believe that the universe is still expanding outward.

Question 2.
Define solar system.
Answer:
Solar system consists of the sun, the planets, stars, their moons, dwarf planets, asteroids and comets. These objects are gravitationally bound.

Question 3.
How did the Earth form?
Answer:

- Approximately 4.54 billion years ago, Solar System was a cloud of dust and gas known as Solar Nebula.
- Due to an explosion, these particles collapsed and began to spin having the sun at centre.
- The bigger particles which revolve around the sun are called planets. Thus the planet Earth formed.

Question 4.
Distinguish between Rotation and Revolution.
Answer:

Question 5.
How many oceans are there in the earth?
Answer:
There are 5 oceans in the Earth.
1. Pacific Ocean
2. Atlantic Ocean
3. Indian Ocean
4. Arctic Ocean
5. Southern Ocean
IV. Paragraph:

Question 1.
Write about the solar system.
Answer:
- There are 8 planets in our solar system.
- The outer planets are Gaseous planets.
- They are Jupiter, Saturn, Uranus and Neptune.
- The inner - rocky planets are Mercury, Venus, Earth and Mars.
- They are called Terrestrial Planets.
- The frozen planets are Uranus and Neptune

Question 2.
Write about the Planet Earth in detail.
Answer:
- Our Earth is called the Blue Planet.

- It is made up of 7 Continents and 5 Oceans.
- We live on the surface of the Earth.
- Around $71 \%$ of our Earth is covered by salt water called Oceans.
- Asia is the largest continent and Australia is the smallest continent.

Question 3.
Explain about the continents.
Answer:
- Earth is made up of 7 continents and 5 oceans.
- The continents are Asia, Africa, North America, South America, Antarctica, Europe and Australia.
- The biggest continent is Asia continent, and the smallest one is Australia.
- Antarctica is a snow covered landmass.

Additional Questions and Answers
I. Fill in the blanks.

Question 1.
The Earth is the ________ planet from the sun.

Answer :
Third
Question 2.
day and night are caused due to the earth's ____________
Answer:
rotation
Question 3.
Universe is also referred to us
Answer:
cosmos

Question 4.

________ is called Earth's twin.

Answer :
Venus

Question 5.
The continent full of snow is _____ 
Answer:
Antarctica
Question 6.
Only percent of water _________ is fresh in earth.

Answer :
2.5

Question 7.
Birlo Planetarium is located in ______
Answer:
Chennai

Question 8.
Galaxy is the huge cluster of _______
Answer:
stars
II. Match the following:

Answer :
1. (b)
2. (e)
3. (d)
4. (c)
5. (a)
III. Short Question and Answers:

Question 1.
What is the galaxy?
Answer:
Galaxy has a huge cluster of stars. Our galaxy 'Milky way is one of the countless billions of galaxies in the Universe.

Question 2.
How many continents are there in the earth?
Answer:
Asia, Africa, North America, South America, Antarctica, Europe, and Australia.

Question 3.
Which are the biggest and smallest continents in our earth?
Answer:
The biggest continent is Asia and the smallest continent is Australia.

IV. Answer in Paragraph:

Question 1.
Why is Mars called the red planet?
Answer:
Mars is the fourth planet from the sun and the second smallest planet in the solar system, after Mercury. It is named after the Roman God of war. It appears red in colour due to the presence of iron oxide on its surface. So, it is often described as the Red planet.
V. Map work:

Question 1.
On a world map mark the five oceans and Continents of the Earth.
Answer:

Question 2.
On a world map mark the deserts and forests.

Answer :