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Primary 4 Science Systems Quiz

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Primary 4 Science AI Generated Generated by Claude Sonnet 4 Updated 2026-06-03
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Questions

TuitionGoWhere Primary School (AI)

Primary 4 Science - Systems Quiz 01

Name: _________________________ Date: _____________

Class: _________________________ Score: ______ / 15

Section A: Multiple Choice Questions (1 mark each)

1. Which organ is responsible for pumping blood throughout the body?

A) Lungs
B) Heart
C) Stomach
D) Kidney

2. The main function of the digestive system is to:

A) Transport oxygen
B) Break down food into nutrients
C) Remove waste from blood
D) Protect the body from germs

3. Which part of a plant transports water from roots to leaves?

A) Flowers
B) Stem
C) Petals
D) Seeds

4. The skeletal system works together with which system to allow movement?

A) Digestive system
B) Respiratory system
C) Muscular system
D) Circulatory system

5. What is the main function of the respiratory system?

A) To digest food
B) To exchange oxygen and carbon dioxide
C) To pump blood
D) To filter waste

Section B: Short Answer Questions (2 marks each)

6. Name the main organs of the circulatory system and their functions.

Answer: ___________________________________________________

7. Describe the path of food through the digestive system.

Answer: ___________________________________________________

8. How do the roots, stem, and leaves of a plant work together?

Answer: ___________________________________________________

9. What are the main parts of the human respiratory system?

Answer: _____________________________________________

10. Explain how the muscular and skeletal systems work together.

Answer: ___________________________________________________

Section C: Application Questions (2 marks each)

11. Why does your heart beat faster when you exercise?

Answer: ___________________________________________________

12. What would happen to a plant if its stem was damaged?

Answer: ___________________________________________________

13. A person eats a sandwich. Describe how the sandwich is broken down and used by the body.

Answer: ___________________________________________________

14. Why is it important for the circulatory and respiratory systems to work together?

Answer: ___________________________________________________

15. Compare the transport system in plants to the circulatory system in humans.

Answer: ___________________________________________________

End of Quiz

Answers

TuitionGoWhere Primary School (AI)

Primary 4 Science - Systems Quiz 01 - Answer Key

Section A: Multiple Choice Questions (1 mark each)

1. B) Heart
The heart is a muscular organ that pumps blood throughout the body.

2. B) Break down food into nutrients
The digestive system breaks down food into nutrients that can be absorbed by the body.

3. B) Stem
The stem contains tubes (xylem) that transport water and minerals from roots to other parts of the plant.

4. C) Muscular system
Muscles pull on bones to create movement. The skeletal system provides structure and the muscular system provides force.

5. B) To exchange oxygen and carbon dioxide
The respiratory system takes in oxygen and removes carbon dioxide from the body.

Section B: Short Answer Questions (2 marks each)

6. Main organs of circulatory system:

  • Heart: Pumps blood throughout the body
  • Blood vessels (arteries, veins, capillaries): Transport blood
  • Blood: Carries oxygen, nutrients, and waste

Award 2 marks for naming organs with functions.

7. Mouth (chewing and mixing with saliva) → Oesophagus (carries food to stomach) → Stomach (breaks down food with acids) → Small intestine (absorbs nutrients) → Large intestine (absorbs water) → Rectum and anus (waste expelled)
Award 2 marks for correct sequence.

8. - Roots absorb water and minerals from the soil

  • Stem transports water and minerals up to leaves, and food from leaves to other parts
  • Leaves make food through photosynthesis using water, carbon dioxide, and sunlight

Award 2 marks for explaining how parts work together.

9. Nose/mouth, windpipe (trachea), bronchi, lungs, diaphragm
Award 2 marks for naming at least 4 parts.

10. The skeletal system provides a framework of bones that muscles attach to. When muscles contract (shorten), they pull on bones, causing movement at joints. Bones cannot move by themselves; they need muscles.
Award 2 marks for explaining muscle-bone interaction.

Section C: Application Questions (2 marks each)

11. During exercise, muscles work harder and need more oxygen and nutrients. The heart beats faster to pump more blood to deliver oxygen and nutrients to the muscles faster, and to remove carbon dioxide and waste products more quickly.
Award 2 marks for explaining increased oxygen/nutrient demand.

12. If the stem is damaged:

  • Water and minerals cannot travel from roots to leaves
  • Food made in leaves cannot travel to other parts
  • The plant may wilt, leaves may die, and the plant may eventually die

Award 2 marks for explaining disruption of transport.

13. 1. Mouth breaks down sandwich mechanically (chewing) and chemically (saliva) 2. Stomach acids further break down food 3. Small intestine absorbs nutrients into blood 4. Blood carries nutrients to cells throughout the body 5. Cells use nutrients for energy, growth, and repair

Award 2 marks for correct description of digestion and use.

14. The respiratory system takes in oxygen from air and releases carbon dioxide. The circulatory system transports the oxygen (via blood) from lungs to all cells in the body, and brings carbon dioxide back to the lungs to be breathed out. Without both systems working together, cells would not get oxygen and waste would not be removed.
Award 2 marks for explaining oxygen transport and waste removal.

15. Similarities:

  • Both transport essential substances throughout the organism
  • Both have tubes/vessels for transport

Differences:

  • Plants: No pump; water moves by transpiration pull; xylem (water) and phloem (food)
  • Humans: Heart pumps blood; blood carries both nutrients and gases

Award 2 marks for correct comparison with at least one similarity and one difference.

Marking Scheme Summary

  • Section A: 5 marks (5 questions × 1 mark)
  • Section B: 10 marks (5 questions × 2 marks)
  • Section C: 10 marks (5 questions × 2 marks)
  • Total: 25 marks

End of Answer Key