CBSE Class-7 Science: Questions 297 - 303 of 322

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Question number: 297

» Electric Current and Its Effects » Symbols of Electric Components » On and Off Switch

MCQ▾

Question

When the switch is ON position, the circuit is said to be:

Choices

Choice (4) Response

a.

Closed

b.

Open

c.

Question does not provide sufficient data or is vague

d.

All of the above

Question number: 298

» Wastewater Story » Waste Water Treatment Plant » Sludge

MCQ▾

Question

Organic matter settled down at the base of sedimentation tank is called as:

Choices

Choice (4) Response

a.

Slush

b.

Contaminant

c.

Sludge

d.

Both a. and c. are correct

Question number: 299

» Water: A Precious Resource » Water Management » Bawris

MCQ▾

Question

Bawris is a common practice in:

Choices

Choice (4) Response

a.

Temperate wet Himalayas

b.

Deserts

c.

Both a. and b. are correct

d.

None of the above

Question number: 300

» Forests: Our Lifeline » Forest and Its Features » Forest a Dynamic Living Entity

MCQ▾

Question

Why forests are called as “dynamic living entity”?

Choices

Choice (4) Response

a.

Because it is an area with a high density of trees and wild life

b.

Because it has different forms of life

c.

Because it is full of life and vitality

d.

All of the above

Question number: 301

» Wastewater Story » Water, Our Lifeline » Clean Water

MCQ▾

Question

Scarcity of clean potable water is due to:

Choices

Choice (4) Response

a.

Industrial development

b.

Population growth

c.

Pollution

d.

All a. , b. and c. are correct

Question number: 302

» Wastewater Story » Water, Our Lifeline » Impurities in Water

MCQ▾

Question

Different types of impurities present in water are:

Choices

Choice (4) Response

a.

Nutrients, Bacteria

b.

Inorganic impurities

c.

Organic impurities

d.

All a. , b. and c. are correct

Question number: 303

» Water: A Precious Resource » Forms of Water » Solid, Liquid and Gaseous Form of Water

MCQ▾

Question

Solid, liquid and gases are three forms of:

Choices

Choice (4) Response

a.

Liquid

b.

Ice

c.

Water

d.

All of the above

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