Page 105 - Science Class 6 Times Publication

3. Answer these questions in short:
a. What is matter? Mention three states of matter.

b. What is element? Give any four examples.

c. What is compound? Give any four examples.
d. De ne
i. atom ii. molecule iii. melting

iv. solidication v. condensation vi. evaporation

e. What is sublimation? Mention examples of two substances
which show sublimation process.
4. Differentiate between:

i. Element and compound
ii. Atom and molecule
iii. Melting and solidi cation

iv. Evaporation and condensation
5. Answer in detail:

a. How can you prove that air is a matter?
b. How are molecules arranged in solid, liquid and gas? Show
with diagrams.
c. Explain evaporation and condensation process with diagrams.
d. Explain the process of sublimation with the help of diagram.
e. What are various uses of change in state of matter?

Project Work

Take a beaker and put pure water in it. Put little sugar in the
water and dissolve it. What do you nd? Put little salt in the

same water and dissolve it. Taste the mixture. What do you  nd?

You can feel the taste of sugar only in the rst case. In the second

case, you can feel the taste of sugar and salt both

Times' Crucial Science and Environment 101 Book 6