EASY
7th West Bengal Board
IMPORTANT
Earn 100

Which energy runs a calculator? And where does it come from?

Important Questions on Physical Environment

MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 1 - Physical Environment>Exercise 40
Write a note about the calculator which can be run without changing a 'cell' or 'battery'.
EASY
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 1 - Physical Environment>Exercise 40
Where does the electricity come from a solar calculator?
MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 1 - Physical Environment>Exercise 40
Do you know any device which can be run by solar energy?
MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 1 - Physical Environment>Exercise 41
Write some uses of thermal energy.
EASY
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 1 - Physical Environment>Exercise 42

Mention some uses of electric energy.

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MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 1 - Physical Environment>Exercise 42

Mention some uses of fossil fuels known to you.

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EASY
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 1 - Physical Environment>Exercise 42
Does the demand of these conventional forms of energy remain constant year after year?
EASY
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 1 - Physical Environment>Exercise 43
What is directly related to population explosion?