Page 84 - Science Class 6 Times Publication

c. Who found loadstone for the rst time?
d. Which directions does a freely suspended magnet show while
coming to rest?
e. Name some devices in which a magnet is used.

3. Give reasons:

a. A magnet attracts iron but not copper.
b. Repulsion is the sure test for magnetism.

c. A freely suspended iron rod may not come to rest showing
N-S directions.
d. Articial magnets are more useful than the natural magnets.

4. Differentiate between:

a. A magnet and a magnetic substance
b. Natural and articial magnet

c. North and south poles of a magnet

5. Answer these questions in detail:

a. Explain the terms magnet and magnetic substances with
examples.
b. What are arti cial magnets? Draw the diagrams of different
kinds of articial magnets.

c. Make a list of properties of a magnet.

d. How do you nd the poles of a magnet?
e. How do you test whether the given substance is a magnet or
not?

f. Write down the uses of magnets.
g. How can you show that a magnet is strong at poles and weak
in the middle?

Project Work

Take two bar magnets and use them in different ways to demonstrate
all the properties of a magnet. Write your experiment, observation
and conclusion separately in each case and show your teacher.

Times' Crucial Science and Environment 80 Book 6