81 When sun light falls on a soap hubble, bright bands of colour are seen. This is caused by
Interference
82 What is known to be the first metal discovered by man?
Gold
83 One of the nine planets of the Solar System that has three rings around it is
Saturn
84 The idea of motion pictures was propounded by
T.A. Edison
85 Lungs are concerned with
Respiratory system
86 We prefer White Clothes in summer because they
Reflects the heat away
87 Topography is a science of
Physical features of a particular area
88 Study of chemical substances and chemical processes of living things is called
Biochemistry
89 The science dealing with life or a possibility of life on planets other than earth is
Exobiology
90 Meteorology is the study of phenomena of
Atmosphere for weather forecast
