61 A body weigh more in a

Vacuum

62 Ice float on water but sinks in

Alcohol

63 As the earth is growing old, the days are becoming

Longer

64 Melting points are lowered by

Increasing pressure

65 Evaporation accompanied by

Cooling

66 During boiling, temperature

Remain the same

67 High flying birds send no shadow

On Earth

68 A metal that was accidentally discovered by a group of wandering is

Copper

69 Typhoid fever attack

Stomach and lungs

70 Humphry Davy invented the

Safety lamp for miners