Question

III. Match the following:
Column A
Column B
1.
sodium
a.
sonorous
2.
graphite
b.
combustion and respiration
electric wires
3.
oxygen
4.
d.
soft metal
copper
metallic coin
5.
e.
pencil lead​

Answer 1

1. Sodium - Soft metal

Sodium can be cut with a knife.

2. Graphite - Pencil lead

Graphite is a carbon compound used in pencils

3. Oxygen - Combustion & Respiration

Oxygen is a supporter of combustion.

Oxygen is needed for cellular respiration - To break down Glucose into ATP molecules.

4. Copper - Electric wires

Silver is the best conductor, but too costly to be used in wires. So, next best conductor, Copper is used in wires because it is cheap.

5. Metallic coin - Sonorous

All metals are sonorous. They produce a ringing sound when struck.