Page 75 - BP1Y 001 Listening Success BT2

A. Listen and answer the following questions. Note taking

1. What is the main idea of this passage? Topic :

smoke and density

water density
population density Main idea :

air density

st
2. Why does smoke rise? 1 Major point :
because of its density

because it is heavier than the surrounding air
because its particles are light Details :
all the above

3. What is smoke mostly made up of?

water
nd
particles 2 Major point :
hot air
everything

Details :

4. What causes smoke to be less dense?
particles

the wind
water

rd
heat 3 Major point :

B. Check True or False.

1. Smoke rises because its particles become Details :

less heavy.

2. Smoke is mostly made up of cold air.
3. Most things are less dense when they are

hotter.

Unit 12. Density 75