Question 1 of 11beginner💡 UnderstandShort Answer4 marks

State whether the following statements are True [T] or False [F].

(i)

Air flows from a region of higher pressure to a region of lower pressure.

Answer

True. Air naturally moves from areas of high pressure to areas of low pressure, which is the fundamental mechanism behind wind formation.

(ii)

Liquids exert pressure only at the bottom of a container.

Answer

False. Liquids exert pressure in all directions—on the bottom, on the sides, and throughout the container.

(iii)

Weather is stormy at the eye of a cyclone.

Answer

False. The eye of a cyclone is a calm region with light winds, while the surrounding area experiences strong winds and heavy rainfall.

(iv)

During a thunderstorm, it is safer to be in a car.

Answer

True. Being inside a bus or car during a thunderstorm provides comparative safety from lightning strikes.

Explanation

(i) The chapter demonstrates through Activity 6.5 that air moves from the inflated balloon (high pressure) to the uninflated balloon (low pressure) until pressures equalize. (ii) Activity 6.2 in the chapter shows water flowing out through holes made on the sides of a plastic bottle, proving that liquids exert pressure on the walls of containers, not just at the bottom. (iii) The chapter states that 'the region of lowest pressure is at the centre, known as the eye of the cyclone. At the eye of the cyclone, the wind is calm, but the surrounding region experiences strong winds and heavy rainfall.' (iv) The chapter explicitly states: 'If you are inside a bus or a car, you are comparatively safer' during lightning conditions.