modul hikmah 10

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SCIENCE SPM

MODULE 10

PAPER 1

1. Which of the following pollutant produced by vehicles can cause environmentalPollution.I. leadII. carbon monoxideIII. sulphur dioxide

A. I and II onlyB. I and III onlyC. II and III onlyD. I, II and III

2. Natural disaster that can spread diseases include

I. droughtII. floodIII. volcanic eruption

A. I and II onlyB. I and III onlyC. II and III onlyD. I, II and III

3. The purpose of preservation of the environment is toA. maintain the natural resourceB. reduce the quality of the environmentC. recover the natural resourceD. change the natural resource from their present condition

4. What gas can cause green house effectA. OzoneB. NitrogenC. HydrogenD. Carbon dioxide

5. The diagram shows the pyramid of numbers for a population in a habitat. Whichthrophic level represents the primary consumers?


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6. Which of the following campaigns are relevant to maintaining the balance innature?

I. recyclingII. replantingIII. adopting rivers

A. I and II onlyB. I and III only

C. II and III onlyD. I, II and III.

7. Which of the following is not an effect of thinning of the ozone layer?A. causes cataract and skin cancer in humansB. reduces photosynthesis in plantC. destroy phytoplanktonD. restores the balance of nature

8. What are materials that can be recycled?

I. plasticsII. glassIII. aluminium cans

A. I and II onlyB. I and III onlyC. II and III onlyD. I, II and III.

9. Which of the following gases cause the formation of acid rain?I. sulphur dioxide

II. carbon monoxideIII. nitrogen dioxide

A. I and II onlyB. I and III onlyC. II and III onlyD. I, II and III.


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10. Diagram 2 shows part of the natural cycle in the environment.

Diagram 2

What is process Z

A. respirationB. photosynthesisC. combustionD. evaporation


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PAPER 2SECTION A +B

1. Figure 1 show the natural cycle of an element.

Figure 1

a. Name the element involved in the cycle.

b. Name the process labeled P, Q and R

P:

Q:

R:

c. S is two processes that can increase the content of carbon dioxide. Give twoprocesses.

i. Give the use carbon dioxide to plants.

ii. Which part of a plant absorbs carbon dioxide


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2. Figure 2 shows the formation of acid rain.

Figure 2a. Complete the figure 2.

b. Name one factory that produces a lot of the gases shown above.

i.

c. Give two effects of acid rain on aquatic animal and land plants.

i.

ii.

d. State two other sources which produce the two gases to the atmosphere.


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3. The results of the pH values of the samples from different area are recorded inTable1.

Sample of water pH value

Forest area 7.0

Town area 6.3

Residential area 6.8

Industrial area 5.8

Table 1

a. Based on the Table, draw a bar graph of the pH value for sample water of

different area.

b. State the most acidic area.


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c. Give two reasons why the river near to the industrial area is acidic.

i.

ii.

d. State two waste substances from the residential area that are disposed of intothe river.

i.

ii.

4. Figure 3 shows a food web. A food web is made up of several food chains.

Figure 3

a. State the producer and secondary consumer.

i. Producer :

ii. Secondary consumer:


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b. What will happen to the paddy yield and rat population if the farmer mange to killall the snakes in the paddy field.

c. Bacteria and fungi are known as decomposers. Explain their role in an

ecosystem.

5. Study the Figure 4 and answer the following questions.

Figure 4

a. What is the main role of ozone layer?

b. Name one substance that causes the thinning ozone layer.

c. Give two negative effects o thinning of the ozone layer.

i.

ii.


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d. Suggest one way to reduce the thinning the ozone layer.

6. Figure 5 shows an environmental phenomenon

Figure 5

a. Name the environmental phenomenon shown in Figure 5.

b. Name the gas that contributes to this phenomenon.

c. What is the main effect of this phenomenon?

d. Give one human activity that contributes this phenomenon.

e. How do green plants and trees help to reduce this phenomenon?


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SECTION C

1. Unplanned development is usually related to the negative effects onbalance on nature.

a. What means by balance of nature.

b. Select two sources of pollution and explain how they cause pollution andtheir effects on the balance of nature.

c. Explain the control measures taken by the government to overcome thepollution problem.


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MODULE 10 - ANSWERS

PAPER 1

1. D 2. D 3. A 4. D 5. C 6. D 7. D 8. D 9. B 10. C

PAPER 2SECTION A+B

1. a. carbonb. P: respiration; Q : photosynthesis; R : Respirationc. burning of fossil fueld. i. photosynthesis ii, leaf

2 a. sulphur dioxide, nitrogen dioxideb. petroleum processing plantc. i. causes river to become more acidic and destroy aquatic animals

ii. kill leaves and plant die

d. i. motor vehicles, ii. burning plastic material

3

4. a.i. paddy plant ii. snakeb. rat population will increasec. help to decompose the dead organism, thus returns the nutrient back to theenvironment.


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5 . a. to absorb ultra violet radiationb. chlorofluorocarbon/ CFCc. cataract/skin cancer/reduce photosynthesis/ decreased/lower immune systemd. reduce using CFC material/replace with HCFC

6. a. green house effects

b. carbon dioxidec. the temperature of the atmosphere increased/sea level increased. deforestation/burning fossil fuele. plants absorb carbon dioxide gases during photosynthesis process.

Section C

Waste products from factoriesThe unfilted smoke released by factories contain soot and acidic gases. Like sulphurdioxide and oxides of nitrogen are detrimental to help and the ecosystem. The soot orcarbon particles can cover the leaves of plants and trees and thus reducephotosynthesis leading to low crops yields.

c. The control measures taken by the government are as follows:

The implementation of rules and regulation such as Environmental Quality Act1974.

Educating the public on the important of protecting and caring for theenvironment through mass media and various environmental campaigns.

In schools, children learn the importance of preserving the balance of nature insubjects like Environmental Studies, General Science, Geography andBiology.

modul hikmah 10

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