Question

B. Give reasons for the following
1.The world never runs out of water because
2. The stars twinkle because
3.Cooking is quicker in a pressure cooker because
4.Lightning is seen before thunder is heard because
5. An electric bulb makes a 'bang' sound when broken because
please short answer this question.​

Answer 1

Answer:

1. The world never runs out of water because of rain and 75% of earth is made up of water . when the water from oceans lakes seas evaporates that turn into rain clouds and the same water comes down to earth in the for of rain.

Answer 2

Answer:

1.the world never runs out of water because the volcanoes supplies efficient amount of water from inner earth and also water is present in atmosphere in the form of water vapour which comes out through Rain

2.the stars twinkle because of atmospheric refraction

3.cooking in pressure cooker becomes faster because it generates steam to cook the food which is more heater than the vapours

4.lightning is seen before the thunder because the speed of light is more than the thunder

5.an electric bulb makes a bang sound because while it breaks it contains the electricity so due to the presence of electricity the bulb makes a bang sound while it breaks