Which is true?
Keep the windows closed
Should not play in open places
Should breathe in the smoke that people release while smoking
Use a handkerchief to cover our mouth while coughing
The mixture of gases that makes up the Earth's atmosphere is called:
Water vapour
Air
Nitrogen
Hydrogen
Moving air is called:
Wint
Wins
Wind
Winv
The gaseous state of water is called:
Water vapor
Ice
Water drops
Glaciers
78%
88%
98%
68%
Which of the following type of dust does air contains?
Dust particles
Waste particles
Germs
Air supplies us with:
Carbon
Oxygen
Air is a mixture of many:
Gases
Dust
Vapour
Wet clothes dry more quickly in the heat due to:
Condensation
Perspiration
Evaporation
Heating
A very strong wind is called a:
Storm
Breeze
Hurricane
