Question

Match the items of Column A with those of Column B :
Column B
Column A
(a) Magnetic substances
1. Magnetite
(b) A dark coloured ore of iron
2. Magnetic compass
3. Nickel and cobalt
(c) Used in navigation for indicating direction
(d) Lodestone
4. Non-magnetic substance
5. Natural magnet
(e) Paper
(f) Exists in pairs
6. Magnetic poles​

Answer 1

Answer:

Thermal expansion is the tendency of matter to change in shape, volume, and area in response to a change in temperature. Temperature is a monotonic function of the average molecular kinetic energy of a substance. ... The kinetic energy of the molecules of a substance increases when the substance is heated.