Heat (CBSE Class-7 Science): Questions 1 - 6 of 18

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Question number: 1

» Heat » Hot and Cold » Hot and Cold Objects

MCQ▾

Question

Examples of hot objects are:

Choices

Choice (4) Response

a.

Boiling water

b.

Sun

c.

Boiling milk

d.

All a. , b. and c. are correct

Question number: 2

» Heat » Measuring Temperature » Precaution in Reading Clinical Thermometer

MCQ▾

Question

Precautions taken while reading the clinical thermometer are:

Choices

Choice (4) Response

a.

The temperature should always be stated with its unit 0C

b.

Reading is noted by placing the thermometer along the line of sight horizontally

c.

Ensure that before use the mercury level is below 350 C

d.

All a. , b. and c. are correct

Question number: 3

» Heat » Measuring Temperature » Laboratory Thermometer

MCQ▾

Question

The reason that we cannot use laboratory thermometer to measure the body temperature is:

Choices

Choice (4) Response

a.

Because range of ordinary laboratory thermometer is 100 C.

b.

Because laboratory thermometer has long thick walled capillary tube

c.

Because level of mercury drops as soon as the thermometer is taken out of the liquid

d.

None of the above

Question number: 4

» Heat » Transfer of Heat » Conduction

MCQ▾

Question

Applications of conduction are:

Choices

Choice (4) Response

a.

Cooking utensils

AND

Woollen clothes

b.

Refrigerators

c.

Double layer blankets

d.

All a. , b. and c. are correct

Question number: 5

» Heat » Hot and Cold » Hot and Cold Objects

MCQ▾

Question

Ice-cream, Ice, juice, things placed in the refrigerator is:

Choices

Choice (4) Response

a.

Hot objects & Warm objects

b.

Cold objects

c.

Warm objects

d.

Hot objects

Question number: 6

» Heat » Transfer of Heat » Convection

MCQ▾

Question

Convection is:

Choices

Choice (4) Response

a.

Mode of transfer of heat in a fluid

b.

In convection the molecules themselves carry heat from hotter region to a colder region

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

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