CBSE Class-8 Science: Questions 308 - 315 of 469

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Question number: 308

» Sound » Human Ear » Structure of Human Ear

MCQ▾

Question

Ear is divided into how many parts?

Choices

Choice (4) Response

a.

Two

b.

Four

c.

Five

d.

Three

Question number: 309

» Some Natural Phenomena » Types of Charges and Their Interactions » Like Charges Repel Each Other

MCQ▾

Question

Like charges:

Choices

Choice (4) Response

a.

Shows no reaction

b.

Repel each other

c.

Attract each other

d.

Question does not provide sufficient data or is vague

Question number: 310

» Friction » Friction- a Necessary Evil » Disadvantages of Friction

MCQ▾

Question

Force responsible for wear and tear of machine of various parts is:

Choices

Choice (4) Response

a.

Drag

b.

Gravity of earth

c.

Relative motion

d.

Friction

Question number: 311

» Some Natural Phenomena » Charging by Rubbing » Charging of Objects by Rubbing

MCQ▾

Question

Take a rubber balloons rub it with wool and bring it close to a wall. What do you find?

Choices

Choice (4) Response

a.

Wool gets charged

b.

Balloons stick to the wall

c.

Balloons does not get charged

d.

Wall gets charged

Question number: 312

» Sound » Sound Produced by Humans » Structure of Voice Box

MCQ▾

Question

Sound of low frequency is called as:

Choices

Choice (4) Response

a.

Bass

b.

Amplitude

c.

Vibration

d.

Shrill

Question number: 313

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

MCQ▾

Question

Lightning conductor consists of:

Choices

Choice (4) Response

a.

Copper strip on the outside of the building which connect metal spikes at the top to a metal plate in the ground

b.

Two charged metals

c.

Metal rod or a cycle spoke with a metal ball or bulb

d.

Two copper plates

Question number: 314

» Chemical Effects of Electric Current » Electroplating » Process of Electroplating

MCQ▾

Question

Deposition of a metal over another metallic object is called as:

Choices

Choice (4) Response

a.

Electrolysis

b.

Electroplating

c.

Electrodes

d.

All of the above

Question number: 315

» Sound » Amplitude, Time Period & Frequency of Vibration » Oscillatory Motion

MCQ▾

Question

Back and forth motion of an object is called as:

Choices

Choice (4) Response

a.

Amplitude

b.

Loudness

c.

Vibration

d.

Oscillation

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