Definitions [5]
Define the following:
Photosynthesis
Photosynthesis: Process of producing food by green plants taking CO2 from the air, water from the soil by roots, and in the presence of sunlight and chlorophyll is called photosynthesis.
Define the term Global warming.
Global warming : An increase in the percentage of carbon dioxide, methane, nitrous oxide and chlorofluorocarbon traps the heat causing the temperature of the earth and its surroundings to rise. This is known as global warming.
Define the following:
Combustion.
Combustion: Combustion also called burning “is burning of substance in the oxygen of air completely producing heat and light is called combustion.”
Define the term smog.
Smog : Oxides of nitrogen form a mixture of smoke and fog known as smog which affects our eyes too.
Define the term pollutants.
Pollutants : Air contains substances which are harmful to plants and animals. These harmful substances are called pollutants.
