PIMSO 2025 - Science - Primary 1 - National Round

Question 1

The food web below links the living things in the farm. An omnivore is an animal that eats plants and other animals. Which of the living things in the web is an omnivore?

1. eagle
2. mouse
3. snake
4. frog

Question 2

Living organisms can be classified based on their structural features as eukaryotes or prokaryotes. This is shown in the diagram below. Which of the following is true based on the diagram?



Diagram: Eukaryotes: nucleus present; single-celled organisms; multicellular organisms. Prokaryotes: nucleus not present; single-celled organisms.

1. Eukaryotes cannot have a single cell
2. Some prokaryotes and all eukaryotes are multicellular organisms.
3. Prokaryotes and eukaryotes do not have anything in common
4. Not all single celled organisms are prokaryotes

Question 3

1. a duck
2. a mouse
3. a whale
4. a millipede

Question 4

Tomatoes need water from the ground to grow and survive. Which part of this plant takes in water from soil?

1. K
2. R
3. S
4. T

Question 5

The diagram shows the features of birds and some mammals. What features are common to both the mammals and birds?

1. eyes and feathers
2. nose and hair
3. eyes and teeth
4. nose and lungs

Question 6

The picture below shows a peanut plant. Which part of the plant has the peanut seeds?



Original choices:
A. roots
B. leaves
C. stem
D. flowers

Editorial review: explain the scientific issue and any missing information.

Question 7

Power of Hydrogen or pH is a measurement of the alkalinity or acidity of a solution. The measurement uses a scale from 0 to 14 where less than 7 is acidic, 7 is neutral, and greater than 7 is alkaline. Anthony gave the table below to his friends. The table shows the solution and their corresponding pH level. Anthony told his friends that solution Z is less acidic than solution X but more acidic than solution Y. What is the possible pH for solution Z?



Table: V: 8.3; X: 5.6; Y: 7.0; Z: unknown.

1. greater than 7.0 but less than 8.3
2. between 5.6 and 7.0
3. between 7.0 and 8.3
4. less than 5.6

Question 8

Vitamins are substances that our bodies need to develop and function normally. The following table shows the vitamins present in the fruits and vegetables and its function. Johnny is eating potato and carrots for breakfast. What vitamins are likely to be present in Johnny’s breakfast?



Original table: Vitamin A — squash, carrots, sweet potato — fat soluble, improve eyesight. Vitamin C — orange, lemon, papaya, squash — improves metabolism, immune system. Magnesium — potato, okra, spinach — required for energy production, oxidative phosphorylation and glycosis. Potassium — cucumber, potato, mushrooms, peas, spinach — helps nerves function and muscles contract.

Editorial note: Read the table as listing nutrients; some row labels are minerals rather than vitamins.

1. Vitamin A only
2. Vitamin A and Magnesium only
3. Magnesium and Potassium
4. Vitamin A, Potassium and Magnesium

Question 9

Angie has accidentally poured two liquids on the floor. It had made a puddle as shown in the figure below. Out of curiosity she observed how the two liquid dry for 3 hours. She drew a line around what was left of each liquid every hour. What can Angie conclude from her observations?

1. The liquid in Puddle Y was oil.
2. She spilled more liquid X than liquid Y
3. The liquid in puddle X disappears after 3 hours
4. The liquid in puddle X dried faster than the liquid in puddle Y.

Question 10

Density is a measure of how tightly packed the particles are in the object. Which of the diagram shows the least dense object if the red circles represent the particles?



Editorial note: Assume equal box volumes and equal particle masses.

1. Diagram A
2. Diagram B
3. Diagram C
4. Diagram D

Question 11

1. Air
2. Water
3. Wood
4. Alcohol

Question 12

Kaloy took a container of ice from the freezer and poured in some juice at a room temperature as shown below. Which of the following will the ice and juice look like when the container is tilted immediately after the juice is poured in?



Original choices:
A. Diagram A
B. Diagram B
C. Diagram C
D. Diagram D

Editorial review: explain the scientific issue and any missing information.

Question 13

In order that appliances will work, electrical plugs should be connected to its appropriate power socket. Which of the following electrical plugs could be inserted to the given socket below?

1. Plug A
2. Plug B
3. Plug C
4. Plug D

Question 14

Rafa rubbed a comb to his hair. He noticed that some strands of his hair stuck to the comb when he removed the comb. This event occurs when two objects have opposite charges. Which combination of charges could result to this kind of attraction called electrostatic attraction?

1. Comb positively charged; hair positively charged
2. Comb positively charged; hair negatively charged
3. Comb positively charged; hair no charge
4. Comb negatively charged; hair no charge

Question 15

Robert listed some appliances that he found at home. Each appliance when used changed electrical energy into other types of energy. Which type of energy do all the appliances change electrical energy into?



Table: electric fan — heat, movement; refrigerator — light, heat, sound; air fryer — light, heat, sound; washing machine — heat, movement, sound.

1. heat
2. light
3. movement
4. sound

Question 16

The table shows the fastest speed an animal can run. Which of the animals are slower than the tiger?



Speeds in km/h: fox 50; giraffe 52; tiger 65; cheetah 120; emu 48.

1. Cheetah and emu
2. Giraffe and cheetah
3. Fox and Emu
4. Tiger and Giraffe

Question 17

Question 18

1. A cat sleeping
2. A soccer ball at rest
3. A ball rolling
4. A boy shooting the ball

Question 19

Which of the options correctly shows the shadow casted by the building?

1. A
2. B
3. C
4. D

Question 20

Rizal is working in the zoo. One of his job is to weigh the sea lion. The table shows the weight of sea lion at different ages. What is the approximate mass of the sea lion at 7 weeks?



Table: 1 week — 2 kg; 5 weeks — 5 kg; 15 weeks — 10 kg; 42 weeks — 35 kg.

Editorial note: Estimate assuming continued growth between the recorded ages.

1. less than 5 kilograms
2. between 10 and 15 kilograms
3. between 1 and 5 kilograms.
4. more than 5 kilograms but less than 10 kilograms