Primary 5 Science Systems Quiz

Primary 5 Science Quiz - Systems

Name: ______________________ Class: ________ Date: ____________ Score: ________ / 50

Duration: 55 minutes Total Marks: 50

This is an original, syllabus-aligned practice quiz built from LLM-inferred templates for the MOE Primary 5 Science theme "Systems". It is not extracted from any specific past-year paper.

Instructions:

• Answer ALL 20 questions.
• Section A: write the letter of the correct answer in the space provided.
• Sections B to D: write your answers in the spaces given.
• The marks for each question are shown in brackets.
• Check your work before handing in.

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Section A: Multiple Choice (Questions 1–5) — 10 marks

Question 1.

(2 marks) Air is a mixture of gases. Which gas makes up the largest amount of the air around us?

• A. oxygen
• B. nitrogen
• C. carbon dioxide
• D. water vapour

Answer: ________

Question 2.

(2 marks) Mei Ling places four objects, one at a time, into a gap in a working circuit. Which object will make the bulb light up?

• A. plastic ruler
• B. wooden chopstick
• C. steel spoon
• D. rubber band

Answer: ________

Question 3.

(2 marks) Which statement about the tubes in a plant stem is correct?

• A. Water-carrying tubes carry water from the leaves to the roots.
• B. Food-carrying tubes carry food made in the leaves to all other parts of the plant.
• C. Food-carrying tubes carry water from the roots to the leaves.
• D. Both types of tubes carry only water.

Answer: ________

Question 4.

(2 marks) When we breathe in, air passes through the nose and the windpipe before entering the lungs. What is the function of the windpipe?

• A. It pumps blood around the body.
• B. It digests the food we eat.
• C. It takes oxygen into the blood.
• D. It carries air from the nose to the lungs.

Answer: ________

Question 5.

(2 marks) A bulb lights up in a circuit with one battery. A second identical battery is added in series. What will happen to the bulb?

• A. It becomes dimmer.
• B. It becomes brighter.
• C. Its brightness stays the same.
• D. It does not light up at all.

Answer: ________

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Section B: Short Answer (Questions 6–10) — 10 marks

Question 6.

(2 marks) State two important jobs of the blood in the human body.

(i) _________________________________________________________________

(ii) _________________________________________________________________

Question 7.

(2 marks) Humans, fish and plants all respire. Complete the table to show the gas each organism takes in and the gas it gives out during respiration.

Organism	Gas taken in	Gas given out
Human	____________	____________
Fish	____________	____________
Plant	____________	____________

Question 8.

(2 marks) A bulb connected to a battery with wires does not light up. Give two possible reasons for this.

(i) _________________________________________________________________

(ii) _________________________________________________________________

Question 9.

(2 marks) Sort these materials into conductors and insulators of electricity:

copper wire, glass, iron nail, plastic straw

Conductors: _________________________________________________________

Insulators: _________________________________________________________

Question 10.

(2 marks) State two reasons why a switch is a useful part of an electrical circuit.

(i) _________________________________________________________________

(ii) _________________________________________________________________

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Section C: Structured Questions (Questions 11–15) — 15 marks

Question 11.

(3 marks) A celery stalk with green leaves was placed in a beaker of red-coloured water and left on a shelf for 2 hours.

Generated experimental_setup for Q11.

(a) After 2 hours, the leaves were seen to have red veins. What does this observation show about the path taken by the water? [1]

(b) Name the tubes in the stem that carried the red-coloured water upwards. [1]

(c) State one other function of the stem of a plant. [1]

Question 12.

(3 marks) Food passes through several organs in the human digestive system.

(a) Write the correct order of these organs starting from the mouth: large intestine, gullet, small intestine, stomach. [1]

(b) In which organ are most of the digested nutrients absorbed into the blood? [1]

(c) State what happens to food in the mouth. [1]

Question 13.

(3 marks) Ravi measured his pulse rate while resting and again immediately after running for 5 minutes.

(a) What is the pulse a sign of? [1]

(b) Would his pulse rate be higher or lower after running? [1]

(c) Explain why the body needs this change during running. [1]

Question 14.

(3 marks) A circuit has one battery, a closed switch and two identical bulbs connected in series. The bulbs are glowing.

(a) What happens to the other bulb if one bulb is removed from its holder? Explain your answer. [2]

(b) State one way to make both bulbs stay lit even if one bulb is removed. [1]

Question 15.

(3 marks) A young plant is pulled out of the soil and its roots are washed clean.

(a) State two functions of the roots of a plant. [2]

(b) After the roots absorb water, name the plant part that carries the water to the leaves. [1]

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Section D: Application Questions (Questions 16–20) — 15 marks

Question 16.

(3 marks) Trace the path of air when a person breathes in.

(a) Fill in the blanks with: windpipe, nose, lungs.

Air enters through the __________ , moves down the __________ and finally reaches the __________ . [1]

(b) Where in the lungs does oxygen pass into the blood? [1]

(c) Explain why breathing rate increases during exercise. [1]

Question 17.

(3 marks) Siti builds Circuit X with one battery and one bulb. She then builds Circuit Y with two identical batteries and the same bulb, all connected correctly.

(a) In which circuit will the bulb be brighter? Give a reason. [2]

(b) Siti adds a second identical bulb to Circuit Y so the two bulbs are in series. What happens to the brightness of the first bulb? [1]

Question 18.

(3 marks) A fish lives in an aquarium of fresh water.

(a) Name the organ the fish uses to breathe. [1]

(b) What gas does the fish take in, and from where does it get this gas? [1]

(c) How is this organ similar in function to a part of the human body? [1]

Question 19.

(3 marks) Both plants and humans have transport systems made of tubes.

(a) State one similarity between the transport system of a plant and the circulatory system of a human. [1]

(b) State one difference between them. [1]

(c) Why must every living thing have some way of transporting substances around its body? [1]

Question 20.

(3 marks) Jun Jie wants to find out whether an unknown object is a conductor of electricity. He connects a battery, a bulb and two crocodile clips in an open circuit.

(a) Describe what he should do with the object to test it. [1]

(b) What result would show that the object is a conductor? [1]

(c) Give one safety reason why the covering of a plug is made of plastic. [1]

— END OF QUIZ —