NCERT Class VI Science Solutions: Chapter 15 – Air Around us Part 3

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SHORT ANSWER QUESTIONS

Question 13:

A list of words is given in a box. Use appropriate words to fill up the blanks in the following statements Air, oxygen, wind, water vapour, mixture, combination, direction, road, bottles and cylinders.

  1. The ______ makes the windmill rotate.

  2. Air is a ______ of some gases.

  3. A weather cock shows the ______ in which the air is moving at that place.

  4. Mountaineers carry oxygen ______ with them, while climbing high mountains.

Answer:

  1. The wind makes the windmill rotate.

  2. Air is a mixture of some gases.

  3. A weather cock shows the direction in which the air is moving at that place.

  4. Mountaineers carry oxygen cylinders with them, while climbing high mountains.

Question 14:

Observe the picture given in Fig, carefully and answer the following questions.

Result for Traffic signal

Traffic Signal

Result for Traffic signal

  1. What is covering the nose and mouth of the police man?

  2. Why is he putting a cover on his nose?

  3. Can you comment on air quality of the place shown in the Fig?

Answer:

  1. Mask

  2. To save himself from dirt/polluted air.

  3. Air quality of the place is not good. It is due to the smoke and gases emitted by the automobiles along with dust particles present in the air.

Question 15:

Garima observed that when she left her tightly capped bottle full of water in the open sunlight, tiny bubbles were formed all around inside the bottle. Help Garima to know why it so happened?

Answer:

Air dissolved in water starts escaping in the form of tiny bubbles due to heat from the sun.

Question 16:

Match the items of Column I with the items of Column II

Match the Items of Column I and Column II (Q)
Match the items of Column I and Column II (Q)

Column I

Column II

Weather cock

Gases and fine dust particles

Mountaineers

Sailing yacht

Fine hair inside the nose

Oxygen cylinders

Smoke

Direction of air flow

Wind

Prevent dust particles

Answer:

Match the Items of Column I and Column II (A)
Match the items of Column I and Column II (A)

Column I

Column II

Weather cock

iv Direction of air flow

Mountaineers

iii Oxygen cylinders

Fine hair inside the nose

v Prevent dust particles

Smoke

i Gases and fine dust particles

Wind

ii Sailing yacht