SOCIAL STUDIES PERIODIC TEST-1

Chapter – 2 (Fascinating Earth)

A) Fill in the Blanks:

1) Ferdinand Magellan is the name of the explorer who proved that the Earth was

round.

2) The Earth is the fifth largest planet of the solar system.

3) The Earth is a unique planet because it has life.

4) The layer of air surrounding the Earth is called atmosphere.

5) Day and night on Earth is caused because of rotation.

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B) Match the following :

1) Spinning movement on an axis - rotation (c).

2) Movement around the sun - revolution (e).

3) Layer of air around the Earth – Atmosphere (d).

4) A sailor from Portugal - Ferdinand Magellan (a).

5) Shape of the Earth - oblate spheroid (b).

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C) Name the following :

1) This movement of the Earth causes day and night – Rotation.

2) This Portuguese sailor who proved that the Earth was round – Ferdinand

Magellan.

3) This layer of air surrounds the Earth – Atmosphere.

4) About three-fourth of our Earth is covered by it - Water.

5) This is a gas we breathe that is found in the Earth’s atmosphere – Oxygen.

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SOCIAL STUDIES PERIODIC TEST-1

D) Answer the questions:

1) What is the position of the Earth in the solar system?

Ans) The Earth is one of the eight planets of the solar system. It is the third

planet from the sun and the fifth largest planet in the solar system.

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2) Which movement of the Earth causes seasons?

Ans) The revolution of the Earth on a fixed path or orbit around the sun

causes change in seasons.

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3) Why is the Earth unique?

Ans) The Earth is one of the eight planets of the solar system. The Earth is a

unique planet because it is the only planet in our solar system which supports

life. It supports life because:

i) It is neither too far nor too close to the sun, making it suitable for life to

exist.

ii) Our Earth has both air and water which helps life to exist.

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4) What is rotation of the Earth?

Ans) The rotation is the movement of the Earth on its axis that causes day and

night.

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5) What is an Orbit?

Ans) An Orbit is a fixed elliptical path that an object takes in space, when it

goes around a star, a planet or a moon. For example- planets move around

the sun in their own orbit.

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SOCIAL STUDIES PERIODIC TEST-1

Extra Question/Answers:

E) Answer the following:

1) How did Ferdinand Magellan prove that the Earth was spherical in shape?

Ans) Ferdinand Magellan of Portugal, with a fleet of five ships and 270 men,

undertook a daring journey by sea. After sailing for three years, they discovered

that they returned to the same place from where they had begun the journey.

This is how, Magellan proved that the Earth was spherical in shape.

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HOTS

1) What is the importance of oxygen in the Earth’s atmosphere?

Ans) The atmosphere of the Earth contains numerous gases. However, the Earth

is the only planet with an atmosphere which contains oxygen. Oxygen is

essential for both human beings and animals to breathe.

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