Tamilnadu Samacheer Kalvi 5th Social Science Solutions Term 1 Chapter 1 Our Earth
Samacheer Kalvi 5th Social Science Guide Our Earth Text Book Back Questions and Answers
I. Fill in the blanks.
1. The distance between the earth and the sun is 150 Million Kilometers.
2. Seasons is caused due to revolution of the Earth.
3. The continent which is covered by ice is Antarctica.
4. The biggest continent is Asia.
5. Mars is described as Red Planet.
6. 71 Percentage of our earth is covered by salt water.
III. Short answer:
1. Define the origin of the Earth.
2. Define solar system?
3. How many oceans are there in the earth?
4. Distinguish between Rotation and
Revolution?
IV. Paragraph:
1. What do you know about Universe?.
2. Write about the nature of the Planet
Earth.
III. Short answer:
Earth , along with the other planets, is believed to have been born 4.5 billion years ago as a solidified cloud of dust and gases left over from the creation of the Sun.
Around it, a thin but fairly stable crust of solid rock formed as Earth cooled.
2. Define solar system?
The collection of eight planets and their moons in orbit round the Sun together with smallest bodies in the form of asteroids , meteoroids and comets
3. How many oceans are there in the earth?
There are five oceans in the Earth
Pacific Ocean,
Atlantic Ocean,
Indian Ocean,
Arctic Ocean and
Southern Ocean.
4. Distinguish between Rotation and Revolution?
When an object turns around an internal axis (like the Earth turns around its axis) it is called a rotation
When an object circles an external axis (like the Earth circles the Sun) it is called a revolution.
IV. Paragraph:
The Universe is all of space and time and their contents, including Planets, Galaxies and all other forms of matters and energy.
Scientists believe that the Universe is still expanding outward
2. Write about the nature of the Planet Earth.
Earth, our home is the third planet from the Sun
It’s the only planet known to have an atmosphere containing free oxygen, oceans of water on its surface.
Earth is the fifth largest of the planets in the Solar system.
Earth is the only planet in the galaxy that can support life.
The Earth provides for us a place to live, a place to sustain our humanity needs.
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