P6 Man and Environment Worksheet (Student Copy)

7/28/2019 P6 Man and Environment Worksheet (Student Copy)

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i-SMART LEARNING CENTRE::

:: CONNECTING KNOWEDGE WITH PASSION

i-SMART LEARNING CENTRE:: CONNECTING KNOWLEDGE WITH PASSION

BLK 713 JURONG WEST ST 71 #B1-37 S640713 TEL: 6794 1250

Section A

1. Acid rain is formed when rainwater dissolves harmful substances in the air to form a weak

acid. Which one of the following causes acid rain to form?

(1) Loud noises from vehicles.(2) Fumes from factories.(3) Smoke from cigarettes.(4) Carbon Dioxide from our lungs ( )

2. Which one of the following is not an effect of acid rain?(1) The trees in the forests die.

(2) The fish in the rivers are killed.

(3) The buildings in the cities are damaged.

(4) People in the cities die of cancer ( )

3. Which of the following can be recycled?

A. Paper cartonsB. Aluminum Cans

C. Empty glass bottles

D. Plastic bottles

(1)A only

(2)A and B only

(3)A,B and C only

(4)A, B, C and D only ( )

4. In Singapore, rubbish is disposed of either by burning it in incinerators or by burying it inlandfills. At a sanitary landfill, a layer of earth is placed over compacted refuse. This is done in

order to

A: prevent the odour from spreadingB: stop the breeding of insects

C: press down the refuse to reduce its volume

D: keep away houseflies and other pests

(1) A, B and D only (2) A, C and D only(3) B, C and D only (4) A, B, C and D only ( )

5. Which one of the following shows the incorrect material recycled from objects found in our

refuse?

Recycled material Object(1) Metal Cans(2) Paper Magazines(3) Plastic Sawdust(4) Glass Bottles ( )


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6.

Which of the following are suitable labels for A, B and C?

A B C

(1) Air with excessive

carbon dioxide

Light pass through

atmosphere

Light reflected

(2) Air with excessivecarbon monoxide

Light deflected backto Earth

Light trapped

(3) Air with excessivecarbon dioxide

Heat absorbed byEarth

Heat deflected back toEarth

(4) Air with excessivecarbon monoxide

Heat reflected Heat absorbed by Earth.

( )

7. Jack took some rubbish he found in a dustbin and classified them into two groups.Group A: Group B:

_________________________

He classified them according to whether __________________________ .

(1) they are biodegradable

(2) they can be recycled

(3) they are waterproof

(4) they cause land pollution or water pollution ( )


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8. The main gas responsible for the cause of the depletion of the ozone layer is ________.

(1)Chloroflorocarbon (CFC)

(2)Water Vapour

(3)Carbon Dioxide

(4)Sulphur Dioxide ( )

9. An oil spill from a tanker affected a large area of water near the seashore. Tom discovered

many dead seabirds on the beach. Which of the following reasons are likely the causes of thedeath of the seabirds?

A. The seabirds were poisoned by the oil they swallowed while preening their oil coveredfeathers.

B. The seabirds ate the fish which were poisoned by the oil.

C. The seabirds drank the sea water which was contaminated by the oil.D. The seabirds feathers were stained with oil and they died due to an exc essive loss of body

heat.

(1) A and B only

(2) A and D only

(3) B and C only

(4) B, C and D only ( )

10. Which of the following ways can we benefit from the conservation of forests?

A. Trees provide us with a constant supply of oxygen.

B. Trees prevent soil erosion on slopes.

C. Some plants have medicinal value to Man.

D. Forests provide animals with a habitat thus preventing their extinction.

(1) A and B only

(2) B and D only

(3) A, B and C only

(4) All of the above ( )


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11. The graph shows the average global temperature in degrees Celsius.

Which of the following is/are reason(s) for the above graphical representation?A: Burning of fossil fuels to generate electricityB: Photosynthesis by green plants

C: Deforestation

D: Burning petroleum to run vehicles

(1) A only

(2) D only

(3) B and C only

(4) A, C and D only ( )

11. The map below shows the location of Halu and Guka village along a river.


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The villages of Halu village are proposing the building of a water treatment plant to supply waterfor home use. The water that is to be treated is pumped to the treatment plant from the point in

the river that is nearest to it.

The water in the river flows towards the sea in the direction as shown by the arrows above.

Which of the positions, R, S, T or U is the most suitable position for building the water treatment

plant?

(1)Position R(2)Position S(3)Position T(4)Position U ( )

12. Which one of the following statements about fossil fuels is NOT true?

(1)They contain chermical energy.(2)They are found in the ground.(3)Burning of fossil fuels causes air pollution.(4)The usage of fossil fuels causes the depletion of the ozone layer. ( )

13. The diagram below shows some human activities which affect the environment.


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Based on the diagram, what are the activities that cause air pollution?

(1)A and B only

(2)A, D and F only(3)B, C and D only(4)B, C and E only ( )

14. Which of the following are reasons why Man uses biotechnology to genetically modify some

crops?

A. The crops are more resistant to pests and diseases.

B. The crops grow faster and produce better yield.

C. The crops are better in nutritional value.D. The crops stay fresher for a longer period of time

(1) A and B only

(2) C and D only(3) A, B and D only

(4) All of the above ( )

15. Which of the following statements are TRUE about the development in modern

biotechnology?

A: It can help us to produce food by fermentation with the help of useful microorganisms.

B: Genetically modified food has the same appearance and characteristics as any food we eat.

C: Genetically modified food results in increased food production which can help countries

facing food shortage.

D: In genetic selection we can easily produce and determine the desirable characteristics we want

in plants within a short time.

(1)A and C only(2)A and D only

(3)A, B and C only(4)B, C and D only

( )


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16. Resources can be classified as renewable or non-renewable. Which of the following is

grouped wrongly?

(1)

Renewable Non-renewable

plants petroleum

(2)


animals metals

(3)


rocks air

(4)


water coal

( )

17. Nowadays we can easily call and speak to people from all over the world with our

handphones even from an aeroplane. This is made possible because _____.

A: communication satellites are used to transmit the signalsB: telephone wires are used to connect every country in the world

C: solar panels are used to produce electricity for phones

D: antennas are used to receive the signals from satellites

1. A and B only2. A and C only3. A and D only4. B and D only

( )

18. Benny placed a big block of ice in a small enclosed room. He noticed that the block of icestarted melting after some time as shown in the diagram below.


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Which one of the following describes what happened to the temperature of the ice, water and

small room when the ice was melting?

Temperature of

Ice Water Small room

(1) No change Decrease Increase

(2) No change Increase Decrease

(3) Decrease Increase Decrease

(4) Increase Decrease Increase

( )

19. PSI (Pollutant Standards Index) values give an indication of the air quality. The indication of

the air quality with the associated range of PSI values are shown in the table below.

PSI Value Air Quality

1 - 50 Good

51 - 100 Moderate

101 - 200 Unhealthy

201 - 300 Very unhealthy

Above 300 Hazardous

The table below shows the PSI in Singapore over a few days.

Day 1 Day 2 Day 3 Day 4 Day 5

45 80 120 135 140

Which one of the following reasons can most likely explain the sudden increase in PSI in the

town from Day 1 to Day 5?

(1)Cutting down of trees in the town.(2)An increase of vehicles on the road.(3)A forest fire in a neighbouring country.(4)An increase in the number of cigarette smokers. ( )


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20. Study the statements below carefully.

A: Coal is a renewable resource.

B: Greenhouse effect will cause skin cancer.C: The main cause of acid rain is deforestation.

D: The burning of fuels causes the greenhouse effect.

Which of the statements above are false?

(1)A and B only(2)A and C only(3)B and D only(4)A, B and C only ( )

21. In cities like Bangkok and Beijing, air pollution is a serious problem. Which one of thefollowing actions is the best way to reduce the level of air pollution in the two cities?

(1) Build multi-storey car parks with car lifts.

(2) Charge a high fee during peak hours for cars on the road.

(3) Only cars that use leaded petrol are allowed to enter the city.

(4) Reduce the number of cars entering the city by encouraging the use of public transport.

( )

22. In 1984, a vessel carrying mercury collided with a fishing vessel at the eastern coast of Japan.

Environmentalists were concerned with the food chains due to the high concentration of mercuryin the sea.

Which one of the following graphs shows the most likely changes to the population of kingfisherthat fed on the fish at the coast?

(1)


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(2)

(3)

(4)

( )


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23. The air in a particular area is being analysed. The result of the analysis is shown in the table.

Gas Present Level

Carbon Dioxide High

Nitrogen Normal

Oxygen Low

Sulphur Dioxide and other poisonous gases High

Water Vapour Normal

The air sample is most probably take from _____.

(1)a school canteen(2)an abandoned playground(3)the premises within an office(4)the surroundings of a chemical factory ( )


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Section B

24. In the box below, there is a list of actions taken by people to reduce different forms of

pollution. Write the correct form of pollution next to its corresponding action.

25. Explain how does the below leads to the greenhouse effect.

_____________________________________________________________________________

______________________________________________________________________________

Action taken Form of Pollution

Factories ensure that workers are not exposed to noise

exceeding 85 decibels over an eight-hour period.

Use strong canvas bag to carry groceries from the

market.

Vehicles imported into Singapore must be fitted with

catalytic converters.

Efflucent discharges are closely monitored.


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26. The diagram below shows what happens to the refuse that is taken to the Ulu Pandan

Incineration Plant.

Explain how two practices carried out at the above incineration plant support the conservation ofnatural resources.

(a)___________________________________________________________________________

______________________________________________________________________________

(b)___________________________________________________________________________

______________________________________________________________________________


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27. The map below shows the burning areas in an Indonesian island.

When a forest fire occurs in a remote forest, firemen need to locate quickly and accurately whichpart of the forest is burning.

a) Name a man-made device that the firemen can use to locate the burning areas on a mapwithout leaving the fire station.

____________________________________________________________________________

b) Name another use for the man-made device in (a).

______________________________________________________________________________

______________________________________________________________________________


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28.

29. Explain how acid rain is formed.

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

When water evaporates, it mixes with air pollutants or chemicals in the air and condenses into water

droplets. The water droplets gather into clouds and fall as rain with the chemicals still dissolved in them.

30. Amy wants to find out if duckweeds are able to survive in polluted water.

a) She was given the following materials:

Thirty duckweeds Three large beakers Oil Detergent 500ml of water

Select materials from the items listed above and list the steps she needs to carry out to come to a

conclusion.

______________________________________________________________________________


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______________________________________________________________________________

______________________________________________________________________________

b) What would Amy observed at the end of her experiment?

______________________________________________________________________________

______________________________________________________________________________

31. State 3 benefits of Genetically modified products.

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

32.

The diagram below shows a sketch diagram of an area around Lake Huron in North

America. There have been complaints made by the locals against Factory X for polluting

the lake waters, killing the fish in it.

a) Are the complaints justified?


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__________________________________________________________________________

b) Explain your answer in Part (a)

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

Documents

P6 Man and Environment Worksheet (Student Copy)