Click the correct answer (True or False).
Drag the correct option and drop it in the blank.
Air mainly consists of .
oxygen and carbon dioxide
nitrogen and oxygen
nitrogen and carbon dioxide
Air expands on .
cooling
heating
both cooling and heating
The act of giving out air of the lungs is called .
inhalation
exhalation
respiration
Garbage should not be burnt, instead it should be disposed in .
farms
playgrounds
landfills
