Page 63 - Science Class 06

F. Very short answer questions.
Write the name for –

1. the materials that can conduct heat and electricity ________________
2. the materials that don't conduct heat and electricity ________________
3. the materials that diffuse very fast ________________

4. the solid that can be dissolved in a liquid ________________
5. the liquid that can be mixed in another liquid ________________
G. Short answer ques ons.
1. What is meant by ma er? Which three features determine it and what are its various
forms called?
2. In how many states does ma er exist? How will you prove that these states are
interchangeable?
3. What do you know about the proper es of solubility and heaviness of ma er?

4. Write notes on the proper es of diffusion, transparency and conduc vity of ma er.
5. What is meant by magne c and non-magne c substances? Explain giving examples and
through experiments?
6. What is combus bility? Give examples.
H. Long answer ques ons.

1. Explain ma er with examples.
2. Explain the three states of ma er.
3. Explain the proper es of ma er.
4. What do you understand by conduc on of heat?

5. What is conduc on of electricity?

Project ActivityActivityActivity
Project
Project
Project Activity
A. Account for the following.
1. Ice floats on water, but iron nails sink in it.

2. Oil floats on water, but glycerine disappears in it.
3. Electric wires are always covered by rubber or plas cs.
4. Mercury is used in thermometers.
5. Solids diffuse very li le and also very slowly.
B. Take a glass and fill it with water to the brim. Take a piece of thin cardboard and place it over
the mouth of the glass. Gently press the cardboard with your le hand and invert the glass.
Now, remove your le hand leaving the cardboard quite free. What happens and why? Explain
clearly. Write a note on it with the help of your teacher.

HOTSTSTS
HO
HO
HOTS
A. Why are switches of electric board made of plas c not metals?
B. Why are iron nails highly magne c and wood shavings non-magne c?

Science-6 63