MEDIUM
7th CBSE
IMPORTANT
Earn 100

Draw labelled diagram of a thermos flask and answer why is the air removed from space between the two walls of glass bottle?

Important Questions on Heat and Its Effects

MEDIUM
7th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 4 - Heat and Its Effects>Exercise>Q 3
Why is the glass bottle held in a place inside the metal case with the help of cork pieces?
EASY
7th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 4 - Heat and Its Effects>Exercise>Q 1
Explain why a clinical thermometer cannot be used to measure high temperature.
EASY
7th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 4 - Heat and Its Effects>Exercise>Q 2
A person has a white shirt and a black shirt. Which shirt will make him more comfortable in winters? Give reasons for your answer.
EASY
7th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 4 - Heat and Its Effects>Exercise>Q 2
A person has a white shirt and a black shirt. Which shirt will make him more comfortable in summers? Give reasons for your answer.
EASY
7th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 4 - Heat and Its Effects>Exercise>Q 3
Why is water not used instead of mercury in thermometers when it is easily available to us?
EASY
7th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 4 - Heat and Its Effects>Exercise>Q 4
The fire fighting suits are always bright and shiny. Why?
EASY
7th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 4 - Heat and Its Effects>Exercise>Q 1
In refrigerators, why are the freezers always located at the top?
EASY
7th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 4 - Heat and Its Effects>Exercise>Q 2
Why do mud houses with thatched roofs keep cool in summers and warm in winters?