Sec 2 NT Water Pollution

Which of the following are examples of the importance of water?

• It supports life processes.

• It causes floods in low-lying lands.

• It helps us to stay hydrated

• It transports substances in the circulatory system

Which source of water is NOT one of the Four National Taps of Singapore?

• NEWater

• Desalinated water

• Imported water

• Seawater

Desalination removes _______ from seawater and turns it into drinking water.

• algae

• bacteria

• chemicals

• salt

Water pollution occurs when:

• Harmful substances enter a water supply

• Industries dispose of waste safely and correctly.

• Humans throw litter in water bodies.

• None of the above.

Which of the following does NOT cause water pollution?

• Fertilizers from farms

• Litter

• Oil spills

• Smoke

Substances that contaminate water are called __________.

• Pollutants

• Pollution

• Resources

• Solvent

What are the sources of water pollution?

• Untreated sewage and industrial waste

• Litter

• Oil spills

• All of the above

Which of the following is NOT an effect of water pollution?

• Litter thrown into the sea traps birds and turtles.

• Oil from oil spills coats the feathers of birds and helps them to fly faster.

• Pesticides washed into rivers poison fish.

• Toxic waste released into water bodies kills aquatic animals and plants.

Untreated sewage from homes and toxic waste from industries can contain _________.

• algae

• fungi

• harmful bacteria

• protein

Which of the following is a negative effect of littering?

• It provides more homes for aquatic animals.

• It becomes a decoration in the sea

• It could entangle and poison aquatic organism

• It creates more job opportunities so that people can be hired to clean the sea