Wind always take place from
High pressure to low pressure
Low pressure to high pressure
Only towards sea
Only towards land
How many percentage of oxygen present in the air?
28
27
21
20
What are the main things the seeds want to germinate?
Minerals
Energy
Light, water, air
Cow dung
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
Which type of fertilizers can be used?
Chemical fertilizers
Natural fertilizers
Pesticides
Insecticides
To remove polluted air from room we use what type of fan?
Normal fan
Table fan
Exhaust fan
Wall fan
Fuels are burnt then what is produced?
Light,cool
Fragrence
Water
Light, heat and smoke
Solar energy take from which source?
Wind
Heat
Sun
The harmful and unnecessary things present in the air are called
Air pollution
Pollutants
Water pollution
Soil
Burning of fossil fuels like petrol sulphur related gases are released and it results in
Acid rain
Hydro carbon
Sulphur
