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What is expansion? Give one example of the use of expansion in our daily life.

Important Questions on Changes Around Us

EASY
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases
Write down the process of evolution of fossil fuels on Earth.
EASY
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases
Which of the following is not an example of a bio-mass energy source?
EASY
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases
Name two uses biogas.
EASY
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases
By what name is biogas popularly known in India?
EASY
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases
Nowadays bio-diesel is used in transportation vehicles as an alternate to diesel. Write two advantages of this measure.
EASY
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases
Write the name of two elements used as nuclear energy.
MEDIUM
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases
List any three differences between nuclear fission reaction and nuclear fusion reaction.
EASY
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases
Which one of the following is an example of Biomass energy source.
MEDIUM
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases
Explain how is nuclear energy generated in power reactors. How is electricity produced from nuclear energy?
EASY
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases
Uranium is used to obtain:
MEDIUM
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases
Write a short note on: Nuclear Energy
EASY
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases

Write down the two benefits of use of solar energy.

EASY
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases
 State two ways to prevent the rusting of iron.
EASY
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases
Which of the following is not an example of a biomass energy source?
MEDIUM
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases

Which of the following are physical changes?

(a) Melting of iron metal        (b) Rusting of iron

(c) Bending of an iron rod     (d) Drawing a wire of iron metal

MEDIUM
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases
Write any four differences between nuclear fusion and nuclear fission.
EASY
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases

Write names of any two energies produced in ocean.

MEDIUM
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases
Useful substance in preparation of freezing mixture is 
MEDIUM
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases

Differentiate between the following:

Expansion and contraction.

MEDIUM
Science>Chemistry>Changes Around Us>Effect of Heat on Solid, Liquid and Gases
What is the increase in the volume of a substance called?