MEDIUM
9th ICSE
IMPORTANT
Earn 100

Which two components of sunlight are not visible to us?

Important Questions on Heat and Energy

MEDIUM
9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 5 - Heat and Energy>PRACTICE QUESTIONS>Q 16
Mention the characteristics of a good source of energy.
MEDIUM
9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 5 - Heat and Energy>PRACTICE QUESTIONS>Q 18
State the uses of wind energy.
MEDIUM
9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 5 - Heat and Energy>PRACTICE QUESTIONS>Q 19
What do three R's refer to save the environment? Explain.
MEDIUM
9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 5 - Heat and Energy>PRACTICE QUESTIONS>Q 21
How is hydroelectric energy produced?
EASY
9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 5 - Heat and Energy>Self Evaluation Test>Q 2
Name two gases known as greenhouse gases?
MEDIUM
9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 5 - Heat and Energy>Self Evaluation Test>Q 3
What do you mean by the anomalous expansion of water?
EASY
9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 5 - Heat and Energy>Self Evaluation Test>Q 4
What is an ecosystem?
MEDIUM
9th ICSE
IMPORTANT
Together With Physics Class 9>Chapter 5 - Heat and Energy>Self Evaluation Test>Q 5
Wood, being a renewable source, its use as a fuel is not advisable. Why?