Write an example for smoke producing things?
Construction of buildings
When vehicles move
Cutting of trees
Evaporation of water
If we place a sheet of white paper just above the flame for a second. What happened to the paper?
It will burn
No reaction
Blue spot on paper
Black mark seen on paper
We can use what type of ovans to prevent air pollution?
Smokeless ovan
Smoking ovan
Heavy ovan
None of these
Fuels are burnt then what is produced?
Light,cool
Fragrence
Water
Light, heat and smoke
Burning of fossil fuels like petrol sulphur related gases are released and it results in
Acid rain
Hydro carbon
Sulphur
Air pollution
What are the main things the seeds want to germinate?
Minerals
Energy
Light, water, air
Cow dung
Which type of gas is produced from refrigerator?
Chloro-Fluro-Carbon
Carbon-monoxide
Carbon-Di-Oxide
Nitrogen
Wind always take place from
High pressure to low pressure
Low pressure to high pressure
Only towards sea
Only towards land
If we plant more trees
We get fresh air
Didn’t get fresh air
Low the oxygen content
Increase the content of carbon –Di-Oxide
If dust particles fall on crops . What happened to the crops?
High yield
Medium level of yield
No yield
Low yield
