2NT Science Revision 1

The picture shows a farmer applying pesticides to the crops in his farm.

Which of the followings could be a consequence of his action?

• The air may become polluted with the pesticide residues.

• It could result in acid rain.

• The pesticide run-off may cause algae bloom in the nearby river.

• The pesticides may flow into the river and cause aquatic life die from poisoning.

Which human activity causes the water pollution shown in the picture?

The picture shows a heavily polluted canal next to the living area in a city. Which human activity causes the water pollution?

• discharge of sewage

• discharge of chemical wastes from factories

• littering

• run-off containing pesticides

Which human activity causes the water pollution shown in the picture?

• discharge of sewage

• discharge of chemical wastes from factories

• littering

• run-off containing pesticides

The picture shows heavy smog occurring in New Delhi. What is the likely source of this air pollution?

Which of the followings is NOT an air pollutant?

• sulfur dioxide

• nitrogen

• carbon monoxide

• particulate matter

The picture shows a tree graveyard in Poland. When rain droplets absorb air pollution like ....................... and nitrogen oxides, acid rain weakens trees by dissolving nutrients in the soil before plants can use them.

The picture shows a source of air pollution. It releases air pollutants like sulfur dioxide, carbon dioxide, and hydrogen fluoride into the atmosphere. Name this source of air pollution.

The burning of .................... ........................ refers to the burning of oil, natural gas, and coal to generate energy. We use this energy to generate electricity, and to power motor vehicles and industrial processes.

Carbon monoxide are produced from ........................... burning of fossil fuel.