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WorksheetsRevision - Topic 7 - Water Pollution
Total questions: 15
Worksheet time: 15mins
We need to identify ways to reduce water because ............
1) aquatic animals and plants will be otherwise negatively affected
2) clean water is important to support life processes
3) people need clean drinking water
1 only
1 and 2 only
1, 2 and 3
2 and 3 only
Which of the following is not an effect of water pollution?
LItter thrown into the sea traps birds and turtles, and causes the to drown.
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.
Refer to the map.
What pollutant(s) is/are likely to be found in the river at X?
chemical fertiliser and human waste
chemical fertiliser and industrial waste
human waste
industrial waste
Refer to the map.
Industrial waste is found at Y. Suggest the source of the industrial waste.
city centre
factories
vegetable farm
village
Refer to the map.
The sewage treatment plant treats waste from the city centre and factories. What could happen if the waste is not treated before being discharged into the sea?
Both the fish and the aquatic plants in the sea will die.
Only the aquatic plants in the sea will die.
Only the fish in the sea will die.
Only the vegetables on the farms will die.
Why is water important?
Animals need water to stand upright
Clean drinking water is needed for cooking
Plants use water during photosynthesis to make food.
Water in our blood helps to transport materials.
How is NEWater produced?
Collecting rainwater.
Imported from natural springs.
Processed from seawater.
Recycling used water.
How is drinking water obtained from seawater?
add water to dilute the seawater until it is safe to drink
chemicals are added to seawater to cover the saltiness
infra-red radiation is used to treat the water
remove the salt from seawater
Which is not a source of water pollution?
fertilisers and pesticides
litter
oil spills
treated sewage
How does an oil spill threaten the survival of aquaticc animals and plants?
oil clogs the gills of fish
oil forms a layer on the surface and prevents air from entering
oil forms a layer on the surface and prevents light from entering
oil forms a layer on the surface and prevents nutrients from entering
Which of the following is not an use for clean water?
for watering plants
raw materials for cooking
raw materials for food and beverages
raw materials for medicine
Which will not help reduce water pollution
cleaning up our waterways
educate the public to keep the waterways clean
enforce laws to prevent pollution to our waterways
not having litter bins near our waterways
What will happen when runoffs carrying fertilisers and pesticides reach the rivers and lakes?
algae will grow rapidly on the surface
fishes will take in the nutrients and grow in size rapidlly
plants grow as there are more nutrients to be absorbed
The nutrients will sink to the bottom and cause the plants to die
Which is not one of the National Taps of Singaore
air-flown water from natural springs
desalination plant
NEWater
water from local catchman.
How are aquatic animals or plants affected by litter?
(1) aquatic animals may be trapped by the litter and cannot get out.
(2) aquatic animals may swallow plastics and their digestive systems cannot break down plastics.
(3) aquatic animals will collide into the litter when swimming
(1) and (2) only
(1), (2) and (3)
(2) only
(2) and (3) only
