Secondary School (English Medium) (5 to 8) कक्षा ६ - CBSE Question Bank Solutions

Boojho took an empty plastic bottle, turned it upside down and dipped its open mouth into a bucket filled with water. He then tilted the bottle slightly and made the following observations.

1. Bubbles of air came out from the bottle.
2. Some water entered the bottle.
3. Nitrogen gas came out in the form of bubbles and oxygen got dissolved in water.
4. No bubbles formed, only water entered the bottle.

Which observations is/are correct?

Which of the following components of air is present in the largest amount in the atmosphere?

The components of air which are harmful to living beings are ______.

Usha took a lump of dry soil in a glass and added water to it till it was completely immersed. She observed bubbles coming out. The bubbles contain ______.

State whether the following statement is true or false. If false, correct them.

Plants consume oxygen for respiration.

State whether the following statement is true or false. If false, correct them.

Plants produce oxygen during the process of making their own food.

State whether the following statement is true or false. If false, correct them.

Air helps in the movements of sailing yachts and gliders but plays no role in the flight of birds and aeroplanes.

Make sentences using the given set of words.

99%, oxygen, nitrogen, air, together

A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.

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

A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.

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

Observe the picture given in figure carefully and answer the following questions.

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 figure?

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

Why is he putting a cover on his nose?

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

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

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?

Paheli wants to present her friend a gift made of plant-fibre. Which out of the following will she select?

Which part of the jute plant is used for getting jute fibre?

Explain the following observations very briefly

An empty glass in fact is not empty.

Explain the following observations very briefly

Breathing through mouth may harm you.

Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.

Oxygen

Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.

Nitrogen