# CBSE (Central Board of Secondary Education- Board Exam) Class-8 Science: Questions 346 - 353 of 469

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## Question number: 346

» Sound » Sound Needs a Medium for Propagation » Vacuum and Loudness

MCQ▾

### Question

Intensity of sound is called as:

### Choices

Choice (4) Response

a.

Oscillation

b.

Shrillness

c.

Loudness

d.

Amplitude

## Question number: 347

» Sound » Amplitude, Time Period & Frequency of Vibration » Amplitude and Frequency of Vibration

MCQ▾

### Question

The maximum vibration of an object is called:

### Choices

Choice (4) Response

a.

Pitch

b.

Vibration

c.

Oscillation

d.

Amplitude

## Question number: 348

» Friction » Friction- a Necessary Evil » How Friction Is Useful

MCQ▾

### Question

Friction helps to:

### Choices

Choice (4) Response

a.

Walk or run

b.

Holding objects

c.

Write on paper

d.

All a. , b. and c. are correct

## Question number: 349

» Some Natural Phenomena » Types of Charges and Their Interactions » Unlike Charges Attract Each Other

MCQ▾

Unlike charges:

### Choices

Choice (4) Response

a.

Shows no reaction

b.

Attract each other

c.

Repel each other

d.

All of the above

## Question number: 350

» Some Natural Phenomena » Earthquakes » Protection Against Earthquakes

MCQ▾

### Question

If you are outside in an earthquake what to do:

### Choices

Choice (4) Response

a.

Move away from buildings, trees, street lights and power lines

b.

Stay outside

c.

All of the above

d.

Question does not provide sufficient data or is vague

## Question number: 351

» Sound » Property of Sound » Noise Pollution

MCQ▾

### Question

Noise pollution is defined as:

### Choices

Choice (4) Response

a.

Presence of excessive or unwanted sound in the atmosphere

b.

Pleasant sounds

c.

Unpleasant sounds

d.

None of the above

## Question number: 352

» Chemical Effects of Electric Current » Electroplating » Circuit for Electroplating

MCQ▾

### Question

Galvanisation is defined as:

### Choices

Choice (4) Response

a.

Plating of Zinc on to iron

b.

Plating of silver on cutlery

c.

Plating of tin on iron

d.

All of the above

## Question number: 353

» Some Natural Phenomena » Transfer of Charge » Discharged and Earthing

MCQ▾

### Question

When an object loses its charge through an agent into the earth the object is:

### Choices

Choice (4) Response

a.

Discharged

b.

Charged

c.

Earthed

d.

Grounded

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