The colour of the sky looks blue because:
(a) Sky is made up of blue colour particles
(b) Blue color of light is of shorter wavelength, so these waves are easily scattered by dust particles and water vapour
(c) Blue colour is more prominent in sunlight
(d) Blue colour is of longer wavelength
Answer:b
Clear nights are colder than cloudy, nights because of:
(a) Conduction
(b) Radiation
(c) Condensation
(d) Insolation
Answer: b
Oil rises up the wick in a lamp because:
(a) Oil is very light
(b) Of the diffusion of oil through the wick
(c) Oil is volatile
(d) Of the capillary action phenomenon
Answer: d
The dress made out of which of the following materials is safe to wear while cooking?
(a) Silk
(b) Cotton
(c) Nylon
(d) Terelene
Answer: b