food preservation sc modul 19

8/2/2019 Food Preservation Sc Modul 19

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SECTION A

Answer all questions.

Every question is followed by four answerA, B, CandD. Choose the correct answer. Then, blacken youranswer on the answer sheet provided. The suggested time for this section is 45 minutes. If you areunable to answer a question, proceed to the next question.

1. Figure 1 shows a piece of bread that has been left for a week.

FIGURE 1

Fungus has grown on the bread. What conditions cause the growth of fungus on the bread.

A Hot and dryB Cold and dryC Hot and dampD Cold and damp

2. The following information shows a pineapple canning process.

Choose the correct sequence.

A M, J, L, KB K, L, M, JC L, J, M, KD M, L, K, J

J - Put the pineapple into a can and pour in the syrup

K- Seal the can

L - Peel the pineapple and cut it into cubes

M- Heat the can


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3. Table 1 shows the steps in recycling waste.

P The waste is separated based on respective categories

Q Machines are used to crush the waste

R The separated waste is sent to the factory for processing

S The waste is processed to get new products

TABLE 1


A P, S, R, QB P, R, Q, SC Q, R, S, PD S, P, Q, R

4. Pictures J, K, L and M show the activities of salting and drying of food.

Which of the following shows the correct order of steps in the activities of salting and drying ?

A J, M, K, LB K, J, M, LC M, J, L, KD J, L, K, M


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5. A bowl of porridge was left on a table. Why was the porridge spoilt after one week ?

A It was kept for too longB It was exposed to the airC It was kept in a cold and dark placeD It was caused by bacteria and fungus

6. Figure 2 shows a process for preserving food.

FIGURE 2

The process is

A dryingB saltingC picklingD deep freezing

7. The information below are steps used when recycling old newspapers.


A N M K LB K N L MC L K N MD M N L K

8. Which of the following statements explain the benefits of recycling industrial waste ?

I Reduce pollutionII Prevent the depletion of natural resourcesIII Produce new products from used materialsIV Reduce the cost of waste disposal

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

K - FilteringL - Soaling and grindingM- DryingN- Smoothing


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9. Which of the following cause food spoilage ?

A FliesB BeetlesC CockroachesD Microorganisms

10. Which of the following is not a condition needed by microorganisms to grow ?

A AirB WaterC NutrientsD Sunlight

11. Three slices of bread, P, Q, and R, are kept in three different places.

Arrange the slices of bread according to how soon moulds would grow on their surfaces, from thefastest to the slowest.

A P, Q, RB Q, R, PC R, P, QD Q, P, R

12. Which of the following are signs that tell us that milk is spoilt ?

I It has a sour tasteII It turns green in colourIII It has an unpleasant smellIV It has a frothy appearance

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

13. Which of the following methods of food preservation is suitable for keeping vegetables for a short

time ?

A DryingB CoolingC CanningD Freezing


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14. Which of the following food cannot be preserved by freezing ?

15. How does the method prevent microorganisms from spoiling the food ?

A There is no air for microorganisms to grow.B There is no water for microorganisms to grow.C Microorganisms cannot enter a sealed plastic bag.D Microorganisms cannot grow inside the palstic bag as it is too hot.

16. Figure 3 shows waste thrown into drains.

FIGURE 3

Which of the following can result from this improper way of waste disposal ?

I DiseasesII Acid rainIII Flash floods

IV Water pollution

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

17. Biodegradable materials are substances that can be broken down by

A heatB sunlightC moisture

D microorganisms

18. Which of the following are advantages of waste decaying ?

I The environment would be less polluted.II A gas from the decay can be harmnessed as a fuel.III Nutrients would be returned to the soil during the decay.

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

C

A B

D


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19. The pictures show foods preserved in different ways.

Which of the following methods are used to preserve the foods ?

R S T

A Canning Pasteurising Vacuumpacking

B Boiling Pickling PasteuringC Vacuum

packingCooling Drying

D Canning Freezing Salting

20. Figure 5 shows waste in a river.

FIGURE 5

Which of the following could be effects of this improper method of waste disposal ?

I Pollution of waterII Spread of diseasesIII Occurrence of flash floodsIV Unpleasant odour and sight

A I and II onlyB II and IV onlyC I, II and III onlyD I, II, III and IV only

21. Patches of white growth are seen on cooked rice which is a few days old. What conditions cause thewhite growth on the rice ?

A Hot and dryB Cold and dryC Cold and dampD Warm and damp


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22. A piece of bread left on the table for a week can go bad because it is

A left in the airB stored in a hot and dry placeC infected with bacteria and fungi

23. Which of the following are characteristics of spoilt food ?

I SourII Mouldy surfacesIII Lighter in weight

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

24. Ainas refrigerator is spoilt. How can she store the fish she just bought from the market for a longtime ?

A Dry the fish.B Store the fish in a can.C Wrap the fish in a plastic.D Put the fish in hot water.

25. Figure 6 shows a way of preserving food.

FIGURE 6

What is this way of preserving food known as ?

A SaltingB DryingC WaxingD Pickling

26. P - The can is closed tightly.Q - Pineapple juice and sugar are added.R - The can is heated to remove air.S - Pineapple cubes are placed in a can.

The above statements are the steps in the canning of pineapples. Which of the following is thecorrect sequence ?

A Q, S, P, RB S, Q, P, RC S, Q, R, PD R, S, Q, P


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27. Figure 7 shows some food that is preserved by pasteurisation.

FIGURE 7

Bacteria cannot grow in this food because

A there is no airB there is no waterC the food is too saltyD they have been killed in this process

28. What does poor waste management result in ?

I Haze

II Acid rainIII Flash floodsIV Dengue fever

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

29. Which of the following waste materials can be buried in the ground ?

A GlassB Plywood

C Plastic bagsD Foodstuffs

30. Figure 8 shows the release of industrial waste into a river.

FIGURE 8

How does this action affect us?

I It cause water pollution.II It causes the river to overflow its banks.III It disturbs the supply of tap water.IV The fish in the river will take in the toxic industrial waste.

A I and II onlyB I and III onlyC I and IV onlyD I, III and IV only


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SECTION B

( 20 MARKS )

The time suggested for this section is 30 minutes. If you are unable to answer a question, proceed to thenext question. Answer all questions.1. The figure shows an experiment conducted by a group of pupils.

X Y Fish kept in the fridge Fish left exposed on the table

a) Write one observation and one inference based on the condition of the fish X and fish Y.

Observation :

Inference : .(2 marks)

b) In this experiment, identify

i. what is changed :

ii. what is observed: ..........

iii. what is kept the same:

(3 marks)2. The pictures show two types of materials.

a) The materials are thrown away as waste.

i) State which of them would decay after some time.

.

ii) What causes the materials to decay?

.(2 marks)

b) Name one other material that would:

Decay : .

Not decay : (2 marks)


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3. The picture shows some of the vegetables.

The vegetables are left on a table.

a) What would happen to the vegetables after 3 days ?

i) ..

ii) .(2 marks)

b) Give a reason for your observation in (a).

.(2 marks)

c) How can you keep the vegetables for a period of time ?

( 1 marks)

4. The picture below shows a factory situated in an area.

a) Name two waste materials that are expected to be produced by this factory.

i. ..

ii. ..(2 marks

b) State two effects of these actions as shown in the picture.

i. .

ii. .(2 marks


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b) Read the dialouge below and answer the questions.

Dina : Do you know that people have been learning to preserve food since the ancient times?

Wani : How is that possible? There was no refrigerator at that time.

Dina : Oh, they used salt! The purpose is just the same.

Based on the dialogue above, write two things that you can observe.

i. ..

ii...

Give your reasons for your observation in question above.

i.

ii.

( 2marks

END OF SECTION B

food preservation sc modul 19

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