5th Social Science Term 1 Lesson 1 Our Earth

5th Social Science Solutions Term 1 Chapter 1 Our Earth

5th Standard Social Science Book Back and Additional Question and answers Term 1 Lesson 1 Our Earth Book in answers download pdf. 5th Social Science Samacheer kalvi guide English Medium Download answers. 5th All Subject Test Book download. 5th Tamil Medium Guide. Class 5 All Subject Book Back Answers.    

• 5th Social Science Term 1, Term 2, Term 3 Book Back Answers – Tamil Medium & English Medium

5th Social Science Guide Our Earth Text Book Back Questions and Answers

Evaluation

I. Fill in the blanks.

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

2. _________ are caused due to revolution of the Earth. Answer: Seasons

3. The continent _________ is covered by iceAnswer: Antarctica

4. The biggest continent is _________.Answer: Asia

5. _________ is described as Red Planet. Answer: Mars

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:

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.

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.

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.

4. Distinguish between Rotation and Revolution.

Answer:

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:

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

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.

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.

I. Fill in the blanks.

1. The Earth is the ______________ planet from the sun. Answer : Third
2. day and night are caused due to the earth’s ________Answer:Rotation
3. Universe is also referred to us ________.Answer: cosmos
4. ___________ is called Earth’s twin.Answer : Venus
5. The continent full of snow is ________.Answer: Antarctica
6. Only percent of water is fresh in Earth.Answer:2.5
7. Birlo Planetarium is located in __________.Answer: Chennai
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:

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.

2. How many continents are there in the earth?

Answer:

• Asia, Africa, North America, South America, Antarctica, Europe, and Australia.

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:

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:

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

Answer:         

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

Answer :