Olibits / Science / Scientific Investigation Skills
Primary 6 Science: Scientific Investigation Skills Practice
Real Primary 6 Science questions on Scientific Investigation Skills, pulled directly from the Olibits question bank — the same questions a child would actually see, not separately written for this page.
Curriculum alignment
Science Teaching & Learning Syllabus, Primary Three to Six (MOE, 2023 syllabus)
Science is not a taught subject at P1/P2 under MOE's own syllabus — our P1/P2 Science content is offered as enrichment beyond the official syllabus, not as a claim of syllabus coverage at those grades.
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Real Scientific Investigation Skills practice questions
A student is investigating how the number of hours of sunlight a bean plant receives each day affects the height it grows to. Which of these should be kept the same for every plant, to make it a fair test?
the height of each plant
the number of hours of sunlight each plant receives
the colour of the flowerpot used
the amount of water given to each plant ✓
To make this a fair test, the amount of water given to each plant must be kept constant; only the hours of sunlight should differ.
A student is investigating how the angle of a ramp affects the average speed of a marble rolling down it. Which of these should be kept the same for every trial, to make it a fair test?
the mass of the marble used ✓
the angle of the ramp
the average speed of the marble
the colour of the ramp
To make this a fair test, the mass of the marble used must be kept constant for every trial; only the ramp angle should differ.
A group of students is investigating how the type of surface affects the distance a toy car travels after rolling down a ramp. Which of these should be kept the same for every trial, to make it a fair test?
the type of surface the car rolls onto
the distance the car travels before stopping
the height from which the car is released ✓
the brand name printed on the car
To make this a fair test, the height from which the car is released must be kept constant for every trial.
A class scatters 20 red paper "insects" and 20 green paper "insects" evenly across a green field, then gives volunteer "predators" one minute to collect as many as they can find, keeping the collecting time and number of predators the same in every round. What should be deliberately changed as the independent variable?
the number of insects of each colour collected
the colour of the paper insects ✓
the number of predators searching
the size of the field
The independent variable is the one factor deliberately changed - here, the colour of the paper insect, to test whether camouflage affects survival.