CBSE Class-6 Science: Questions 246 - 251 of 318

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Question number: 246

» Air Around Us » Oxygen for Aquatic Animals & Plants » Air in Soil

MCQ▾

Question

The animals which live inside the soil get oxygen for breathing from the air present between the:

Choices

Choice (4) Response

a.

Water

b.

Soil particles

c.

Air

d.

All of the above

Question number: 247

» Air Around Us » Composition of Air » Carbon Dioxide

MCQ▾

Question

Gas used in fire extinguishers is:

Choices

Choice (4) Response

a.

Oxygen

b.

Carbon-dioxide

c.

Nitrogen

d.

All of the above

Question number: 248

» Electricity and Circuits » Electric Cell » Composition of an Electric Cell

MCQ▾

Question

Electric cell is called as dry cell because:

Choices

Choice (4) Response

a.

It is dry

b.

It has all liquid chemical

c.

It has no liquid chemical in it

d.

It cannot be recharged

Question number: 249

» Water » Conservation of Water » Rainwater Harvesting

MCQ▾

Question

What are the purposes of rooftop rainwater harvesting?

Choices

Choice (4) Response

a.

Collecting rainwater falling on roof and storing it in big tanks for later use

b.

Collecting rainwater falling on roof and making it percolate into ground to recharge ground water

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

Question number: 250

» Air Around Us » Composition of Air » Dust and Smoke

MCQ▾

Question

Why the traffic policeman wears mask?

Choices

Choice (4) Response

a.

To protect themselves from UV rays

b.

To protect themselves from sun rays

c.

To protect themselves from smoke

d.

All of the above

Question number: 251

» Electricity and Circuits » Electricity » An Introduction to Electricity

MCQ▾

Question

Electricity is useful because it can be converted into various forms of energy such as:

Choices

Choice (4) Response

a.

Mechanical Energy

AND

Heat Energy

b.

Light energy

c.

Sound Energy

d.

All a. , b. and c. are correct

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