MEDIUM
Earn 100
Match the words in column I with those in column Il.
Column I
Column Il
a. a particle
i. is made up of molecules of salt
b. a molecule
ii. are alike
c. powders
iii. contain tiny particles
d. all molecules of a substance
iv. are different
e. molecules of chalk and sand
v. tiny piece
f. a particle of salt
vi. smallest particle of a substance
Important Questions on Materials Around Us
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Write names of any two energies produced in ocean.
MEDIUM
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
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Write down the two benefits of use of solar energy.
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