Std 6 Lesson No 15 Air Around Us

Front 1

1 atmosphere-

Back 1

the envelope of air which surrounds our Earth

Front 2

2 combustion-

Back 2

an act or process of burning

Front 3

3 accumulate

Back 3

increase in number or amount

Front 4

4 suffocation -

Back 4

to make uncomfortable by want of fresh air

Front 5

5 smoke-

Back 5

suspended carbon particles in air

Front 6

6 gravity -

Back 6

the pull of Earth on the bodies

Front 7

7 exchange-

Back 7

mutual change of components of things by two substances

Front 8

8 respiration-

Back 8

process by which digested

food reacts with oxygen

inside the body producing

water vapour,carbon dioxide

and heat energy

Front 9

9 components-

Back 9

part of a mixture

Front 10

10 oxygen -

Back 10

gas present in air that helps in burning

Front 11

11 carbon dioxide-

Back 11

a gas produced by burning of

fuels or respiration by

organisms

Front 12

12 nitrogen

Back 12

largest volume of gas present

in air which does not

help in burning

Front 13

13 organism -

Back 13

any kind of living being

Front 14

14 interdependence-

Back 14

the mutual dependence of living organisms on

one another for

their survival

Front 15

15 fertiliser-

Back 15

chemical containing nitrogen

which acts as food for plants