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प्रश्न
The picture in Figure 8.4 shows a tree line along the sea coast on an island near the equator. As shown, the treetops are permanently bent in one direction. Are the trees bent towards the sea or away from it? Explain.
उत्तर
In the coastal regions of an island near the equator, heating and cooling of air are a regular phenomenon. During the daytime, the land gets heated up quickly compared to the water in the sea. The air above the land gets heated and rises up and is replaced by the cool air from the sea giving rise to the sea breeze. This sea breeze makes the trees bend towards the land.
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संबंधित प्रश्न
Following are precautions one must take in case a storm is accompanied by lightning.
(i) Do not take shelter under a tree.
(ii) Do not take shelter under an umbrella with a metallic end.
(iii) Do not take shelter in open garages, storage sheds, etc.
(iv) Do not take shelter in a bus in the open.
Which one of these is not correct?
Air around us exerts __________ .
The moving air is called _________ .
State whether the following statement is True or False:
Warm air is lighter than cool air.
To expel hot air out of the kitchen, ‘A’ has an exhaust fan fitted on the window of her kitchen and ‘B’ has a similar exhaust fan fitted on the wall near the ceiling of her kitchen. Which of the exhaust fan will expel the hot air more effectively? Explain why?
Match Column I with Column II. There can be more than one match.
| Column I | Column II | ||
| (a) | on heating air | (i) | descends |
| (b) | on cooling air | (ii) | expands |
| (iii) | contracts | ||
| (iv) | rises | ||
Describe an activity to demonstrate that warm air is lighter than cool air
