Write true or false for each statement:

(a) On touching a lump of ice, we feel cold because some heat passes from our body to the ice.

(b) Heat flows from a body at a high temperature to a body at a low temperature when they are kept in contact.

(c) All solids expand by the same amount when heated to the same rise in temperature.

(d) Telephone wires are kept tight between two poles in summer.

(e) Equal volumes of different liquids expand by different amounts when they are heated to the same rise in temperature.

(f) Solids expand the least and gases expand the most on being heated.

(g) A mercury thermometer makes use of the property of expansion of liquids on heating.

(h) Kerosene contracts on heating.

(i) Water is a bad conductor of heat.

(j) Medium is necessary for the transfer of heat by radiation.

(k) Land and sea breezes are convection currents of cold and warm air.

(l) Liquids are heated by conduction and radiation.

(m) Black surfaces are poor absorbers of heat radiations.

(a) True

(b) True

(c) False
Correct Statement — All solids expand by the different amount when heated to the same rise in temperature.

(d) False
Correct Statement — Telephone wires are kept loose between two poles in summer.

(e) True

(f) True

(g) True

(h) False
Correct Statement — Water contracts on heating from 0°C to 4°C.

(i) True

(j) False
Correct Statement — Medium is not necessary for the transfer of heat by radiation.

(k) True

(l) False
Correct Statement — Liquids are heated by conduction and convection.

(m) False
Correct Statement — Black surfaces are good absorbers of heat.