Water Pollution

What are the possible consequences of releasing untreated sewage into the sea?

• Marine animals cannot breathe and die of suffocation.

• Marine animals feed on the sewage and get choked to death.

• Harmful bacteria in the sewage kills the marine animals.

• Excessive sewage leads to global warming.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Which of the following is not a source of water in Singapore?

• NEWater

• imported water from Indonesia

• water from water catchment areas

• water from desalination plants

What type of water pollutant is shown in the diagram?

• household waste

• chemical waste from factories

• oil spill

• fertiliser run-off from farms

Tags

NGSS.MS-ESS3-3

A water sample taken from a river was tested with the pH indicator paper. The result is shown in the photo. What is the pH of the river water?

Answer explanation

pH 7 indicates a neutral pH. This means the river water is not polluted.

Tags

NGSS.MS-PS1-2

The bird's body is coated with a substance, making it unable to fly and hunt for food. What kind of water pollutant is it?

Tags

NGSS.MS-ESS3-3

Which of the following is NOT a harmful effect of water pollution?

• flooding

• food poisoning

• sea animals dying from lack of oxygen

• respiratory disease

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

Which of the following DOES NOT help to control water pollution in Singapore?

• treating sewage from home and factories before releasing it into the sea

• raising awareness through the 'Save Water Campaign'

• dumping chemical wastes into the waterways

• Fine factories that release untreated chemicial wastes into drains

The diagram shows a map of a small costal town. What is the main source of water pollution at point X?

• animal wastes washed into the river from domestic farm

• oil spill from motor vehicles

• pesticides washed into the river from the vegetable farm

• toxic wastes discharged into the river by heavy industries

Litter is one of the sources of water pollution. Which of the following statements is NOT an effect of litter?

• Litter will clog the rivers and cause flooding.

• Litter can cause mosquito breeding and spread diseases.

• Aquatic animals may choke on the plastic bags.

• Litter can contaminate the water and affect the water quality.

Tags

NGSS.MS-ESS2-4

NGSS.MS-LS2-1

The diagram shows some dead fish in a canal near a school. What is the most likely reason for fish dying in the canal?

• There are no water plant in the canal.

• The temperature of the water is not suitable for the fishes to live.

• The water in the canal was polluted due to littering by the school children.

• The water was polluted by untreated chemical waste released by the factories.

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-4