Question

2 Air expands on
(a) cooling
(b) heating O (c) processing
3. Air exerts
on the kite to fly higher.
(a) force
(b) pressure O (C) weight
4. Compared to cold air, hot air has lower
(a) mass
(b) weight
0 (c) volume
5. Smoke contained in warm air always
(b) moves sideways (c) rises up
O (d) mass
(d) density
(
(d) all of these
(a) sinks
CRV​

Answer 1

Answer:

2.heating

3.pressure

4.weight

5.air

Answer 2

Answer:

(2) Air molecules expand on heating and contract on cooling.

(3)

This is because the wind coming from our back side, strikes the Kite and exerts pressure on the kite to make it fly higher and higher.

(4) Hot air is lighter than cold air.

(5) Smoke always rises up because it is less denser than air.