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Melaka Trial 2022 Sains Kertas 1 · SMK Gajah Berang

1
Rashid was splashed with liquid hydrochloric acid in his eyes while conducting an electrolysis experiment in a science lab. What actions should be taken by Rashid?
2
Rina found a man who was unconscious and not breathing. Rina decided to perform Cardiopulmonary Resuscitation (CPR). What is the first step when performing CPR?
3
### Table 1 | Student | Pulse rate per minutes (mm Hg) | | | |---|---|---|---| | | At rest | Walking | Running | | Student 1 | 70 | 96 | 120 | | Student 2 | 78 | 100 | 126 | How to control the constant variable in the experiment?
4
Diagram 2 shows a poster encouraging consumers to buy appliances with an energy efficient label. Which of the following is the advantage of using energy efficient appliance?
5
Diagram 3 shows carbon footprint. What can you do to reduce carbon footprint?
6
Diagram 4 shows the stages in mitosis. Which of the following arrangements is correct?
7
Genetically modified organisms (GMOs) are organisms that are genetically modified by combining animal genes with plant or bacterial genes. The diagram 5 shows an example of a food that has been genetically modified. Which of the following is a disadvantage of genetic engineering technology towards human?
8
Diagram 6 shows the growth curve of a type of animal. Which of the following animals has a growth curve as shown above?
9
The diagram 7 shows the difference between a normal human joint and an osteoarthritis patient's joint. What is the problem faced by osteoarthritis patients?
10
The Diagram 8 shows the cross-section of a woody plant. Estimate the age of the tree in the Diagram 8.
11
Diagram 9 shows human endocrine glands. Among glands A, B, C and D, which gland secretes hormone that changes excessive glucose into glycogen?
12
Which of the following is the effect of excessive alcohol intake on health?
13
Which of the following is the correct atomic substance and molecular substance?
14
### Table 2 | Element | Proton number | Nucleon number | |---|---|---| | P | 15 | 32 | | Q | 11 | 24 | | R | 11 | 23 | | S | 6 | 14 | Which element is a pair of isotope?
15
Diagram 10 is a laboratory apparatus made of borosilicate glass. Why is borosilicate glass used to make laboratory apparatus?
16
Diagram 11 shows a product made of vulcanised rubber. Vulcanised rubber is produced by adding substance X to natural rubber. What is the function of substance X?
17
Free radicals often appear in television advertisements and is debated in health talks. Which of the following is not the effects of free radicals on human health?
18
Diagram 12 shows one of the community's favourite dishes in Malaysia. Why is the satay dish served with cucumber and onion?
19
Diagram 13 shows a velocity-time graph for the motion of a motorcycle. Determine the velocity of the motorcycle when the time is 15 seconds.
20
Diagram 14 shows two substances, A and B. Which of the following statements is true when A and B are in free fall?
21
The following information describes a situation. > A passenger who was standing in a moving bus was thrown and fall forward when the bus driver suddenly applied the brakes. What caused the passenger to be thrown and fall forward?
22
Diagram 15 shows a nuclear power station. Why do some countries use nuclear energy as an energy source to generate electricity in their countries?
23
The information below shows the characteristics of a cleaning material Q. - Involves low production costs - Produced from the fermentation process of agricultural waste - Does not pollute the environment - Produces less waste during manufacturing What is the cleaning agent Q?
24
Which of the following is the best method to prevent the spread of COVID-19 disease?
25
The table below shows the calorie value of three types of food. | Type of food | Calorific value (kJg-1) | |---|---| | Fried noodle | 12.7 | | Fresh milk | 5.6 | | Banana | 3.3 | Azizah eats breakfast consisting of 100g of fried noodles, 50g of bananas and 100g of fresh milk. How many calories did Azizah take?
26
Diagram 16 shows the nitrogen cycle. What is the importance of the nitrogen cycle to the environment?
27
Diagram 17 below shows a type of food that contains food stabilizers. Which of the following uses the same chemicals as the food in the Diagram above?
28
Diagram 18 shows an environmental awareness campaign poster. Which of the following is the best method to support the campaign?
29
Diagram 19 shows human activity. Which of the following is an effect of this activity?
30
Salma puts 10 cm of magnesium tape into sulphuric acid in a boiling tube. What is the average rate of reaction if the time to dissolve all the magnesium tape is 4 minutes?
31
Which of the following catalysts is used in Haber process?
32
Which of the following pairs of hydrocarbon has a general formula of CnH2n+n ?
33
Which of the following statements about alcohol is correct?
34
Diagram 20 shows the changing size of lumen artery. What steps should be taken to overcome the above problem?
35
Diagram 21 shows the soap making process. What is the solution P ?
36
Diagram 22 shows the apparatus for plating iron nails. What is the metal L?
37
Which of the following is the correct ray diagram of light from object passing through a convex lens.
38
Diagram 23 shows the use of an optical instrument. What are the characteristics of the image formed?
39
Diagram 24 shows a hydraulic jack How much force must be applied on piston Q so that piston R can push up the load of 3000 N? [ Tekanan = \frac{Daya}{Luas permukaan} ] [ Pressure = \frac{Force}{Surface area} ]
40
What is the name for the position of the satellite marked W shown in the diagram 25?
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