MEDIUM
7th CBSE
IMPORTANT
Earn 100

A student tested a new liquid to decide whether it is suitable for use in a liquid-in-glass thermometer. It is found that the liquid does not expand uniformly with temperature. What will be the effect of this on the scale of temperature?

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 3
Name any two liquid-in-glass thermometers. How do they differ from each other?
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.