Form 3 Chapter 2

Form 3 ScienceChapter 2

FORM 3 CHAPTER 2TRANSPORT SYSTEM

1. Diagram 1 shows two types of blood vessels, P and Q.

(a) Name blood vessels P and Q on Diagram 1.

[2 marks]

(b) What is the function of P and Q?

(i) P: ……………………………………………………………………………………………….

(ii) Q:………………………………………………………………………………………………..

[2 marks]

(c) Name the blood vessel that connects blood vessel P and Q?

………………………………………………………………………………………………………

[1 mark]

(d) Explain why there is a difference in the thickness of the wall in blood vessels P and Q.

………………………………………………………………………………………………………

………………………………………………………………………………………………………

[1 mark]

(e) What is the function of R?

………………………………………………………………………………………………………

[1 mark]

143

P: ………………………. Q: ……………………….

Diagram 1

R


2. Diagram 2.1 shows the transverse section of the stem of a balsam plant.

(a) Based on Diagram 2.1, label structure P and Q and state their functions.

Structure Name FunctionP

Q

[4 marks]

(b) The outer part of the stem of a plant is removed as shown in Diagram 2.2.

(i) What can be observed about the condition of the plant after 8 weeks? Draw your observation in the box provided.

[1 mark]

(ii) Explain your observation in (b)(i).

…………………………………………………………………………………………………..

…………………………………………………………………………………………………..

144

Diagram 2.2

Diagram 2.1

Q __________________

P __________________


[1 mark]3. Diagram 3 illustrates the circulation of blood in the human body.

(a) Label the following on Diagram 3.

Aorta Right ventricle Pulmonary artery

[3 marks]

(b) Mark using arrow, , to show the flow of oxygenated blood in the circulatory system.

[1 mark]

(c) The systemic circulation is the circulation of blood from the heart to the body cells and back to the heart again. Label the systemic circulation on Diagram 3.

[1 mark]

(d) State one difference between blood vessel P and blood vessel Q.

…………………………………………………………………………………………………………..

…………………………………………………………………………………………………………..

[1 mark]

145

P

Diagram 3

Q

Lungs

Body


4. (a) A pupil observed that the condition of a plant is different in the morning compared to the afternoon.

(i) Based on the observations in Diagram 4.1, state the difference in the condition of the plant.

…………………………………………………………………………………………………

…………………………………………………………………………………………………

[1 mark]

(ii) What inference can be made based on Diagram 4.1.?

…………………………………………………………………………………………………..

…………………………………………………………………………………………………..

[1 mark]

(iii) State your hypothesis based on your observations in Diagram 4.1.

…………………………………………………………………………………………………..

…………………………………………………………………………………………………..

[1 mark]

146

12

6

39

12

457

8

10

11

12

6

39

12

457

8

10

11

Morning Afternoon

Diagram 4.1


(b) The pupil then carries out an experiment to investigate the situation in Diagram 4.1. Diagram 4.2 shows the arrangement of apparatus for the experiment.

The pupil takes the following steps:

S 1 Two similar green plants X and Y are set up as shown in Figure 4.2.S 2 Initial mass of X and Y are taken.S 3 Plant X is left at room temperature that is 30 oC S 4 Plant Y is put under a heat source that is 40 oCS 5 The final mass of X and Y are taken after 2 hours.S 6 The results are tabulated in table 4.3

Results:

Plants Initial mass Final massX 280.60 g 280.00 gY 280.60 g 278.80 g

Table 4.3

(i) Using the formula,

calculate the rate of transpiration for plant X and Y and complete Table 4.4.

147

Electronic balance

Water

Layer of oil

Cotton wool

Thermometer

30 oC

Electronic balance

Water

Layer of oil

Cotton wool

Thermometer

40 oCHeat source

Diagram 4.2

Plant X Plant Y

Rate of transpiration = Mass lost (g) Time (hour)


Plant Rate of transpiration (g/hour)P

Q

Table 4.4[2 marks]

(ii) Using Table 4.4, draw a bar chart to show the rate of transpiration in plant P and plant Q.

[2 marks]

(iii) Based on the bar chart in (b)(ii), what can be said about the rate of transpiration in the plants?

………………………………………………………………………………………………………

………………………………………………………………………………………………………

[1 mark]

148

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

Rat

e o

f tr

ansp

iratio

n (g

/hou

r)

Plant


(c) State the variables involved in this experiment.

Manipulated variable

Responding variable

Constant variable

[3 marks]

(d) Based on the experiment, state the relationship between temperature and the rate of transpiration.

………………………………………………………………………………………………………

………………………………………………………………………………………………………

[1 mark]

149


5. Diagram 5 shows the components of blood.

(a) Using the following words, label P, Q and R on Diagram 5.1.

Red blood cell White blood cell Platelet

[3 marks]

(b) State the function P.

…………………………………………………………………………………………………………

[1 mark]

(c) Name the component of blood which contains haemoglobin.

………………………………………………………………………………………………………..

[1 mark]

(d) What is the importance of R?

……………………………………………………………………………………………………….

[1 mark]

150

P

Diagram 5.1

Q R


(e) Diagram 5.2 shows three bags of blood from three different donors.

A B AB

Diagram 5.2

(i) If a patient with blood group B needs a blood transfusion, which bag of blood will be compatible? Mark (√ ) in the box provided in Diagram 5.2.

[1 mark]

(ii) Explain what will happen if incompatible blood group is used for the transfusion.

………………………………………………………………………………………………….

………………………………………………………………………………………………….

[1 mark]

151

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Form 3 Chapter 2