Primary 6 PSLE Science Semestral Assessment 1 (Mid-Year) Paper 1

TuitionGoWhere P6 Science - SA1 2026 (Version 5)

School: TuitionGoWhere
Subject: Science
Level: Primary 6
Assessment: Semestral Assessment 1 (SA1)
Duration: 1 hour 45 minutes
Total Marks: 100 marks
Date: May 2026

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INSTRUCTIONS TO CANDIDATES

1. Write your name and class in the spaces provided.
2. This paper consists of TWO sections.
3. Answer ALL questions.
4. Write your answers in the spaces provided in this booklet.
5. You may use a calculator for calculations.
6. All working must be shown clearly.

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SECTION A: Multiple Choice Questions (56 marks)

1. What do plants use carbon dioxide for during photosynthesis? (2 marks)

• A) To breathe
• B) To make glucose
• C) To make oxygen
• D) To absorb water

2. Which part of the plant absorbs water from the soil? (2 marks)

• A) Leaves
• B) Stem
• C) Roots
• D) Flowers

3. A non-contact force acts: (2 marks)

• A) Only when objects touch
• B) Without objects touching
• C) Only on metals
• D) Only downward

4. On the Moon, your weight would be: (2 marks)

• A) The same as on Earth
• B) More than on Earth
• C) Less than on Earth
• D) Zero

5. The SI unit for mass is: (2 marks)

• A) Newton
• B) Kilogram
• C) Gram
• D) Pound

6. Secondary consumers eat: (2 marks)

• A) Only plants
• B) Primary consumers
• C) Only decomposers
• D) Producers only

7. In the food chain: Grass → Rabbit → Fox → Decomposer, the fox is a: (2 marks)

• A) Producer
• B) Primary consumer
• C) Secondary consumer
• D) Decomposer

8. The word equation for photosynthesis is: (2 marks)

• A) Glucose + Oxygen → Carbon dioxide + Water
• B) Carbon dioxide + Water → Glucose + Oxygen
• C) Oxygen + Water → Glucose + Carbon dioxide
• D) Carbon dioxide + Oxygen → Water + Glucose

9. Streamlining reduces: (2 marks)

• A) Weight
• B) Air resistance
• C) Gravitational force
• D) Contact force

10. A moving object has: (2 marks)

• A) Only potential energy
• B) Only kinetic energy
• C) Both potential and kinetic energy
• D) No energy

[Questions 11-28 continue with similar format, covering photosynthesis, ecosystems, forces, and energy topics...]

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SECTION B: Open-Ended Questions (44 marks)

Question 1 (15 marks)

Lisa investigates whether plants need soil nutrients for healthy growth. She grows identical bean plants in different conditions:

• Plant A: Rich garden soil with fertilizer
• Plant B: Poor sandy soil
• Plant C: Soil with no fertilizer for 3 months
• Plant D: Hydroponic solution (water with dissolved nutrients)

(a) What factor is Lisa investigating? (1 mark) (b) Name THREE variables she should control. (3 marks) (c) Predict and explain the results for each plant. (8 marks) (d) What would happen if Plant D had no nutrients in the water? (2 marks) (e) Why is this experiment important for agriculture? (1 mark)

Question 2 (14 marks)

[Food web diagram and questions about energy flow, trophic levels, and ecosystem balance]

Question 3 (15 marks)

[Forces investigation with spring balances, measuring friction, and energy transformations]

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END OF PAPER

MARKING ALLOCATION

• Section A (MCQ): 56 marks
• Section B (Open-ended): 44 marks
• Total: 100 marks

TuitionGoWhere P6 Science - SA1 2026 (Version 5) ANSWER KEY

Assessment: Semestral Assessment 1 (SA1)
Total Marks: 100 marks

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SECTION A: Multiple Choice Questions - ANSWERS (56 marks)

1. (B) To make glucose
2. (C) Roots
3. (B) Without objects touching
4. (C) Less than on Earth
5. (B) Kilogram
6. (B) Primary consumers
7. (C) Secondary consumer
8. (B) Carbon dioxide + Water → Glucose + Oxygen
9. (B) Air resistance
10. (B) Only kinetic energy

[Additional MCQ answers 11-28...]

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SECTION B: Open-Ended Questions - ANSWERS (44 marks)

Question 1 (15 marks) (a) Effect of soil nutrients on plant growth (1 mark) (b) Light amount, water amount, temperature (3 marks) (c) Plant A: Best growth (nutrients available); Plant B: Poor growth (nutrient deficient); Plant C: Declining health (nutrients depleted); Plant D: Good growth (nutrients in water) (8 marks) (d) Plant would show poor growth similar to Plant B (2 marks) (e) Helps farmers understand fertilizer needs for crop production (1 mark)

Question 2 (14 marks) [Detailed answers about food webs, energy transfer, and ecosystem relationships]

Question 3 (15 marks)
[Detailed answers about forces, friction measurements, and energy calculations]

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MARKING GUIDELINES:

• Award marks for scientifically correct alternative wordings
• Accept spelling errors if meaning is clear
• Look for conceptual understanding over exact terminology
• Give partial credit for method marks in calculations