MEDIUM
7th CBSE
IMPORTANT
Earn 100

Name any two liquid-in-glass thermometers. How do they differ from each other?

Important Questions on Heat and Temperature

MEDIUM
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 2 - Heat and Temperature>EVALUATE>Q 4
In a laboratory, since Anushka has not got laboratory thermometer to determine the boiling point of a liquid, she used a clinical thermometer. Will she be able to measure temperature correctly? Explain.
MEDIUM
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 2 - Heat and Temperature>EVALUATE>Q 5
What is radiant heat? How do black and white coloured objects absorb heat?
EASY
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 2 - Heat and Temperature>EVALUATE>Q 6
Compare the three modes of heat transfer.
MEDIUM
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 2 - Heat and Temperature>EVALUATE>Q 1

A utensil, which is made of thick copper base, is placed on the gas burner to heat up water in it.

a) Describe briefly how heat is transferred:

i) From gas burner to water.

MEDIUM
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 2 - Heat and Temperature>EVALUATE>Q 1

A utensil, which is made of thick copper base, is placed on the gas burner to heat up water in it.

a) Describe briefly how heat is transferred:

ii) Spread through water in the utensil.

EASY
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 2 - Heat and Temperature>EVALUATE>Q 1

A utensil, which is made of thick copper base, is placed on the gas burner to heat up water in it.

Explain why water would boil faster when a lid is placed on the utensil.

HARD
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 2 - Heat and Temperature>EVALUATE>Q 2
How can heat loss through radiation be reduced in a vacuum flask? Explain with a diagram.
EASY
7th CBSE
IMPORTANT
WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 2 - Heat and Temperature>EVALUATE>Q 3
Hot water system and refrigerator also work on the same principle. How is their working similar? Explain.