Olibits / Science / Human System Enrichment
Primary 5 Science: Human System Enrichment Practice
Real Primary 5 Science questions on Human System Enrichment, 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.
Olibits is an independent learning platform and is not affiliated with or endorsed by the Ministry of Education. See our FAQ for the full breakdown.
Enrichment topic. This goes beyond what the MOE syllabus asks at this level. It is offered as extra practice, not as syllabus coverage.
Real Human System Enrichment practice questions
Roughly how many times does a resting child breathe in one minute?
About 5 to 10 times
About 60 to 80 times
About 20 to 30 times ✓
About 200 to 300 times
A resting child breathes about 20 to 30 times in one minute. The rate goes up during exercise.
A pupil climbs three flights of stairs. Her muscles work much harder than when she was resting. Which of these is true about her muscles now?
They use more oxygen and make less carbon dioxide than before
They use less oxygen and make more carbon dioxide than before
They use less oxygen and make less carbon dioxide than before
They use more oxygen and make more carbon dioxide than before ✓
When muscles work much harder, such as during climbing stairs, they need more oxygen to release energy from food, and they produce more carbon dioxide as a waste product, compared to when the body is resting.
Lina counted her breaths for one minute during different activities. Sitting: 16 breaths. Brisk walking: 24 breaths. Sprinting: 42 breaths. Which statement is supported by these results?
Sprinting and brisk walking made her take the same number of breaths
Sitting made her take more breaths in one minute than brisk walking did
She took fewer breaths in one minute as the activity became harder
The harder the activity, the more breaths she took in one minute ✓
The count rises from 16 to 24 to 42 as the activity gets harder. Her muscles need more oxygen, so she breathes faster.
A pupil compares breathing at rest. A baby takes about 30 to 40 breaths in one minute, a ten-year-old about 18 to 22 and an adult about 12 to 16. Which statement best explains this pattern?
Younger children breathe faster because their lungs make carbon dioxide faster than adults' lungs do
Younger children are always more active than adults, so they need to breathe faster all the time
Younger children have smaller lungs that hold less air, so they need more breaths to take in enough oxygen ✓
Younger children's lungs get tired more easily, so they must breathe more often
Smaller lungs hold less air, so each breath takes in less oxygen. Younger children need more breaths in a minute to get enough oxygen.