CBSE Class-8 Science: Questions 381 - 388 of 469

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Question number: 381

» Some Natural Phenomena » Earthquakes » Protection Against Earthquakes

MCQ▾

Question

Where to put weed killers, pesticides and flammable products to avoid hazardous situations during earthquakes

Choices

Choice (4) Response
a.

In closed cabinets

b.

On bottom shelves

c. Both a. and b. are correct
d. None of the above

Question number: 382

» Pollution of Air and Water » Air Pollution » Acid Rain and Taj Mahal

MCQ▾

Question

Corrosion of marble of the monuments due to acid rain is called as:

Choices

Choice (4) Response
a.

Marble cancer

b.

Yellowing of the marble

c.

Acid rain

d. All of the above

Question number: 383

» Pollution of Air and Water » Water Pollution » Prevention of Water Pollution

MCQ▾

Question

Different methods used to purify water are:

Choices

Choice (4) Response
a.

Boiling

b.

Ultraviolet rays

c.

Chlorination

d. All a. , b. and c. are correct

Question number: 384

» Light » Concept of Light » What Makes Things Visible

MCQ▾

Question

What makes thing visible:

Choices

Choice (4) Response
a.

Only when light reflected by an object enters our eyes

b.

Eyes

c.

In presence of light

d.

In the dark

Question number: 385

» Pollution of Air and Water » Water Pollution » Water Treatment Plant

MCQ▾

Question

Water treatment plant should be installed in all:

Choices

Choice (4) Response
a.

Companies

b.

Industrial areas

c.

Houses

d. None of the above

Question number: 386

» Light » Types of Reflection » Regular Reflection

MCQ▾

Question

Reflection of light from a smooth surface is called as:

Choices

Choice (4) Response
a.

Diffuse reflection

b.

Regular reflection

c.

Specular reflection

d. Both b. and c. are correct

Question number: 387

» Light » Laws of Reflection » Incident Ray, Reflected Ray

MCQ▾

Question

A ray which strikes the reflecting surface is called as:

Choices

Choice (4) Response
a.

Incident ray

b.

Reflected ray

c.

Normal

d. All of the above

Question number: 388

» Pollution of Air and Water » Air Pollution » How Does Air Get Polluted?

MCQ▾

Question

Man-Made resources which lead to air pollution are:

Choices

Choice (4) Response
a.

Industrialization

b.

Invention of automobiles

c.

Overpopulation, deforestation

d. All a. , b. and c. are correct

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