Page 140 - Science Class 6 Times Publication

c. A metal that is liquid at the room temperature

i. Sodium ii. Potassium

iii. Mercury iv. Tin

d. Which of the following is a metalloid?

i. Silicon ii. Calcium

iii. Steel iv. Aluminium

e. The alloy of copper and zinc

i. Steel ii. Brass

iii. Bronze iv. German Silver

2. Answer these questions in very short:

a. What are metals?
b. Name the metal which is liquid at ordinary temperature.
c. Name a soft metal which can be cut with a knife.

d. Name a non-metal which conducts electricity.
e. Which is the hardest substance? Is it metal or non-metal?

f. What are coinage metals? Give examples.
3. Dene the following:

a. Metalloid b. Non-metals c. Malleability
d. Ductility e. Conductivity f. Alloy

4. Write down the uses of:

a. Metals b. Non-metals c. Iron

d. Copper e. Silver f. Gold

5. Write down differences between:

a. Malleability and ductility

Times' Crucial Science and Environment 136 Book 6