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Perak Trial 2025 Science Kertas 1

1
Which of the following materials can be thrown into the sink?
2
Which of the following matches is correct regarding fire extinguisher and label colour?
3
Diagram 1 shows one step in performing cardiopulmonary resuscitation (CPR). What should be done if the victim has started breathing but is still unconscious?
4
Raju's body mass is 55kg and his height is 1.65m. What is Raju's BMI?
5
What is the source of alternative fuel that can be used to reduce socio-scientific issues in the energy sector?
6
Diagram 2 shows an activity that is being carried out in an area. What is the effect of the activity on the environment?
7
Diagram 3 shows the genotype for a type of flower with different colours. | Bunga Ungu Purple Flower | Pp | |---|---| | Bunga Putih White Flower | pp | Rajah 3 Diagram 3 What is the possible phenotype ratio for the offspring produced from the mating of Pp x pp?
8
Which of the following is the correct match for the factors that cause variation?
9
What is the main function of the skeletal system in vertebrates?
10
Diagram 4 shows a pair of muscles in the human arm. What is the role of muscle X and muscle Y when the arm is bent?
11
Diagram 5 shows an endocrine gland. What is the action should be taken to overcome the effect of hormone deficiency secreted by gland R?
12
Diagram 6 shows one example of drug. What is the effect of the drug on body coordination?
13
Diagram 7 shows the symbol for element Q. What causes the element Q to be chemically inert and not undergo any chemical reactions?
14
Diagram 8 shows the use of radioisotope in the medical field. Which of the following is the function of the radioisotope Cobalt-60 in Diagram 8?
15
What are the elements present in the alloy used to build aeroplane?
16
What is the reason ceramics are used in the making of dentures?
17
Diagram 9 shows an item made from a type of rubber. What is the advantage of the process used in the production of the item?
18
Antioxidants are found in several types of foods. What is food that is rich in antioxidants?
19
Diagram 10 shows a toy car moving from R to S. | Pecutan = | Halaju akhir - Halaju awal | | | masa | | Acceleration = | Final velocity - Initial velocity | | | time | If the time taken is 4 seconds, what is its acceleration?
20
Which of the following statements describes free fall?
21
Diagram 11 shows two tins, K and L that are hanging then swing simultaneously with the same force. K takes a longer time to stop swinging. Which of the following statements is correct?
22
Diagram 12 shows a nuclear power plant. What is Y?
23
Diagram 13 shows two petri dishes that were taken out after being stored in a dark cupboard for three days at room temperature. Which of the following factors causes the growth of the bacteria?
24
A student has fallen off his bicycle, causing his knee to be injured and bleeding. What should the student's mother do to prevent infection in his wound?
25
Diagram 14 shows a child suffering from a disease. Which of the following foods can help the child to recover?
26
Diagram 15 shows the roots of a type of plant. Which of the following is the effect of planting this type of plant?
27
Table 1 shows the function of three types of chemical substances used in food processing. | Bahan | Fungsi | | Substances | Function | | P | Mencegah pembiakan mikroorganisma | | | Prevents reproduction of microorganism | | Q | Melunturkan warna asal makanan yang tidak dikehendaki | | | Bleaches unwanted color from food | | R | Meningkatkan rasa makanan | | | Enhances food taste | Jadual 1 Table 1 Which of the following chemical substances is correctly matched?
28
Table 2 shows the time taken for the color of the methylene blue solution to decolourise for three types of water samples in 2020 and 2021. | Jenis Sampel Air Types of water samples | Tahun 2020 Year 2020 Masa yang diambil untuk warna larutan metilena biru luntur (jam) Time taken for the colour of methylene blue solution to decolourise (hour) | Tahun 2021 Year 2021 Masa yang diambil untuk warna larutan metilena biru luntur (jam) Time taken for the colour of methylene blue solution to decolourise (hour) | |---|---|---| | M | 4 | 6 | | N | 2 | 3 | | P | 3 | 1 | Jadual 2 Table 2 Based on the data in the years of 2020 and 2021, which statement is correct?
29
What is the use of effective microorganisms, EM?
30
Which of the following situations show a fast reaction?
31
Ali soaked his dirty school clothes for 1 hour. After washing, the stains still didn't disappear completely. What other more effective way to remove the stubborn stains?
32
Which of the following is an organic carbon compound?
33
Diagram 16 shows a word equation of a chemical reaction. | Glukosa Glucose | + | Yis Yeast | -> | X | + | Karbon dioksida Carbon dioxide | Rajah 16 Diagram 16 What is the characteristic of X?
34
Diagram 17 shows the cross-section of a human blood vessel. Which of the following foods causes the formation of deposits Q if it is taken excessively and its effect on human health?
35
Which of the following substances is an electrolyte?
36
Diagram 18 shows an electrochemical cell. Which of the following statements is correct?
37
Diagram 19 shows an object placed in front of a convex lens at a distance less than the focal length, f. What are the characteristics of the image formed for the object in Diagram 19?
38
Diagram 20 shows an optical device. Which of the following statements is correct about the device?
39
Diagram 21 shows a hydraulic system at the car workshop. What is the weight of the car that can be carried with the input force of 20 N? | Tekanan = | Daya | | Pressure = | Luas permukaan | | | Force | | | Surface area |
40
The following information shows the GPS coordinates of an area. | DMS: 5° 10' 35.05" N | 12° 0.6' 18.25" E | What is the coordinate in DD format?
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