CBSE Class-8 Science: Questions 354 - 360 of 469

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Question number: 354

» Friction » Increasing and Reducing Friction » Rolling Friction

MCQ▾

Question

Rolling friction:

Choices

Choice (4) Response
a.

Increases the friction

b.

Lesser than sliding friction

c.

Has no effect

d.

Reduces the friction

Question number: 355

» Some Natural Phenomena » Earthquakes » What Causes an Earthquake?

MCQ▾

Question

The Indo-Gangetic basin, Rajasthan region and the capital of the country (New Delhi) falls in zone:

Choices

Choice (4) Response
a.

High Damage Risk Zone

b.

Zone 4

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

Question number: 356

» Sound » Human Ear » Loudness and Pitch

MCQ▾

Question

Frequency perceived by a listener is called as:

Choices

Choice (4) Response
a.

Pitch

b.

Loudness

c. None of the above
d. Question does not provide sufficient data or is vague

Question number: 357

» Some Natural Phenomena » Lightning » What Is Lightning

MCQ▾

Question

Sparks in the sky are called as:

Choices

Choice (4) Response
a.

Tsunami

b.

Lightning

c.

Charging

d.

Earthing

Question number: 358

» Some Natural Phenomena » Earthquakes » What Is an Earthquake?

MCQ▾

Question

Earthquake is:

Choices

Choice (4) Response
a.

Phenomenon in which the ground suddenly and violently shakes

b.

Thunderstorm

c.

Earthing

d.

Storm wave

Question number: 359

» Some Natural Phenomena » The Story of Lightning » Lightning Safety

MCQ▾

Question

Safety measures against lightening are:

Choices

Choice (4) Response
a.

Keep distance from vulnerable locations

b.

Do not use wired phones

c.

Rush indoors to protect yourself

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

Question number: 360

» Friction » Factors Effecting Friction » Surface Irregularities

MCQ▾

Question

Force of friction depends upon the:

Choices

Choice (4) Response
a.

Greater the roughness of the two surfaces greater is the force of friction

b.

State of smoothness of two surfaces

c.

State of roughness of two surfaces

d. Both a. and c. are correct

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