# SPM Science 2018, Paper 2 (Question 9)

Question 9:
Diagram 9 shows an electromagnetic spectrum.

Diagram 9

(a) Name the tool that is used to detect wave.

(b) Radioactive is one of the waves in the electromagnetic spectrum.
Label with letter R the position of radiowave spectrum in Diagram 9.

(c) State another one wave in the electromagnetic spectrum.

(e) Do you agree that the use of telecommunication devises in daily life will enhance the well being of human?

(a)
Oscilloscope

(b)
Position of R between 30 kHz – 300 GHz

(c)
Microwave

(d)
Can move far

(e)
Agree
- Information exchange will be quicker
Or
Disagree
- Disturbs daily routines

# SPM Science 2018, Paper 2 (Question 7 & 8)

Question 7:
Diagram 7 shows a menu of Andrew’s breakfast.

Diagram 7

(a) Name the class of food for milk. [1 mark]

Table 2 shows the calorific value for three types of food.

Table 2

(b) Andrew took 250 g of bread, 200 g of milk and 100 g of orange.
Calculate his total calories intake for breakfast. [1 mark]

(c) Andrew is 15 years old, while his sister Amy is 25 years old.
Who requires a higher amount of calories daily?

(d) Amy did not take seafood in her diet for a long period of time.
(i) What is the health problem that she may suffer?

(a) Class of food for milk is Protein.

(b)
Calorific value of bread = 250 × 9.4 = 2350 kJ
Calorific value of milk = 200 × 13.7 = 2740 kJ
Calorific value of orange = 100 × 1.5 = 150 kJ
Total calories intake of breakfast for Andrew = 5240 kJ

(c)
Andrew requires a higher amount of calories daily.
Boys need more calories than girls.

(d)(i) Goitre

(d)(ii)
Lack of iodine

Question 8:
Diagram 8 shows the deflection of radioactive radiation by an electrical field.

Diagram 8

Give a reason for the observation. [1 mark]

(i) the highest penetration power?
(ii) the highest ionization power? [2 marks]

(d) Name one example of radioactive substance used in medical field. [2 marks]
Explain its usage.

(a)

(b)

(c)(i)
Gamma rays has highest penetration power

(c)(ii)
Alpha ray has highest ionization power

(d)
Cobalt-60
Used to treat cancer

# SPM Science 2018, Paper 2 (Question 5 & 6)

Question 5:
Diagram 5 shows a schematic diagram for the inheritance of mice’s fur colour.

Diagram 5

(a) In Diagram 5, complete the genotype of parent R and offspring S. [2 marks]

(b) Name process A. [1 mark]

(c) Based on Diagram 5, state the ratio of black fur mice to white fur mice. [1 mark]

(d) Match the following terms with their correct definition. [2 marks]

(a)
R : Hh
S : Hh

(b)
Meiosis

(c)
2 : 2

(d)
Dominant gene = Gene that shows its effect even with the presence of opposite traits gene.
Genotype = Genetic composition of an organism

Question 6:
Diagram 6 shows the cross section of an oil palm fruit.
Diagram 6

(a) Based on Diagram 6, state the part that contains oil with the highest quality. [1 mark]

(b) Complete the flow chart of extraction process of palm oil. [2 marks]

(c) There are several types of cooking oil in the market.
Give three reasons why you should use palm oil as your cooking oil. [3 marks]

(a) Kernel

(b)

(c)
1. Does not contain cholesterol
2. Contain beta-carotene
3. Can prevent cancer

# SPM Science 2018, Paper 2 (Question 3 & 4)

Question 3:
Diagram 3 shows two types of hair which are curly and straight hair for 30 customers at a saloon.

Diagram 3

(a) Based on Diagram 3, complete Table 1. [2 marks]

Table 1

(b) Based on Table 1, draw a bar chart to show the number of customers against the types of hair. [2 marks]

(c) Based on bar chart in 3(b), state the type of variation. [1 mark]

(a)

(b)

(c) Discontinuous variation

Question 4:
Diagram 4.1 and Diagram 4.2 show an experiment to study the effect of sunlight on white photographic paper coated with argentum chloride.

(a) Based on Diagram 4.1, state the colour of the photographic paper after being exposed to sunlight. [1 mark]

(c) State the variables in this experiment. [2 marks]
(i) Manipulated variable
(ii) Responding variable

(d) State the operational definition for photographic paper. [1 mark]

(a) Grey

(b)
Photographic paper reacts to light

(c)(i)
Presence of sunlight

(c)(ii)
Colour change of photographic paper

(d)
Photographic paper is a paper that turns grey when exposed to sunlight

# SPM Science 2018, Paper 2 (Question 1 & 2)

Question 1:
A student conducts an experiment to study the tensile strength of two types of substance. Diagram 1.1 and Diagram 1.2 show the results of the experiment.

(a)
Based on Diagram 1.1 and Diagram 1.2, name the substance which has high tensile strength. [1 mark]

(b)
State one manipulated variable for this experiment. [1 mark]

(c)
State one hypothesis for this experiment. [1 mark]

(d)
Carbon is a non-metal substance. Based on this experiment, state the operational definition for non-metal. [1 mark]

(e)
Mark (\/) the substance which has the same characteristic as the substance in Diagram 1.1. [1 mark]