CBSE Class-7 Science: Questions 275 - 282 of 322

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Question number: 275

» Forests: Our Lifeline » Forest Products » Use of Forest Products

MCQ▾

Question

Forest herbs, which are used for medicinal purposes, are:

Choices

Choice (4) Response

a.

Amla

b.

Neem, Cassava

c.

Bark of cinchona

d.

All a. , b. and c. are correct

Question number: 276

» Light » Spherical Mirrors » Concave Mirror

MCQ▾

Question

Concave mirrors are used in:

Choices

Choice (4) Response

a.

Torches, head lights, shaving mirror

b.

Flood lights

c.

Collecting heat radiations

d.

All a. , b. and c. are correct

Question number: 277

» Water: A Precious Resource » Depletion of Ground Water » Agricultural Activities

MCQ▾

Question

Increase in agriculture land leads to the use of:

Choices

Choice (4) Response

a.

Canals and tube wells

b.

More ground water for irrigation

c.

Both a. and b. are correct

d.

None of the above

Question number: 278

» Forests: Our Lifeline » Forest » Herbs and Shrubs in Forest

MCQ▾

Question

Part of forest consists of herbs and shrubs are:

Choices

Choice (4) Response

a.

Understoreys & Forest floor

b.

Understoreys

c.

Canopy

d.

Forest floor

Question number: 279

» Light » Sunlight » Colors of Sunlight

MCQ▾

Question

White light of sun consists of how many colours:

Choices

Choice (4) Response

a.

Seven

b.

Seen in rainbow

c.

Five

d.

Spectrum of light

Question number: 280

» Electric Current and Its Effects » Symbols of Electric Components » Electric Circuit

MCQ▾

Question

Conducting wires are:

Choices

Choice (4) Response

a.

Good conductors of electricity

b.

Bad conductors of electricity

c.

Insulators

d.

None of the above

Question number: 281

» Wastewater Story » Sanitation and Disease » Vermi-Processing Toilets

MCQ▾

Question

What is a vermicomposting toilet?

Choices

Choice (4) Response

a.

Toilets in aeroplane and trains

b.

Toilets in which excreta is treated by earthworms

c.

Toilets which use chemicals to disinfect human waste

d.

None of the above

Question number: 282

» Water: A Precious Resource » Ground Water » Processes of Seepage of Water Into Ground

MCQ▾

Question

Collection of water above the impervious rock and under the surface of earth is called as:

Choices

Choice (4) Response

a.

Aquifers

b.

Ground water

c.

Infiltration

d.

All of the above

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