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Primary 5 Science Systems Quiz
Free P5 Science Systems quiz, Ox Exam version, with questions, answers, and syllabus-aligned practice for Singapore students.
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Questions
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Answers
Primary 5 Science Quiz - Systems (Answer Key)
Answer 1.
(b) Root
Answer 2.
(b) Phloem
Answer 3.
(b) Mouth
Answer 4.
(c) Small intestine
Answer 5.
(b) To take in oxygen and remove carbon dioxide
Answer 6.
(c) Heart
Answer 7.
(i) Stem: holds the plant upright and transports water, mineral salts and food between the roots and leaves. (ii) Leaves: make food for the plant using sunlight, water and carbon dioxide (photosynthesis).
Answer 8.
A broad, flat surface gives the leaf a larger area to absorb more sunlight for making food.
Answer 9.
- The teeth chew and break the food into smaller pieces (physical digestion).
- Saliva moistens the food and digests some starch into sugar (chemical digestion).
Answer 10.
Mouth → gullet → stomach → small intestine → large intestine
Answer 11.
Its great length and folds give it a larger surface area to absorb digested food quickly and efficiently.
Answer 12.
The diaphragm contracts and moves downwards (flattens), allowing the chest cavity to expand so air flows into the lungs.
Answer 13.
Arteries, veins and capillaries.
Answer 14.
A cell is the smallest/basic unit of life; all living things are made up of one or more cells.
Answer 15.
A plant cell has chloroplasts (and/or a cell wall), while an animal cell does not.
Answer 16.
Without water, the roots could not absorb water to replace water lost through the leaves. The cells lost their firmness, so the plant drooped/wilted.
Answer 17.
(i) The xylem (water-carrying tubes). (ii) Water is absorbed by the roots and transported up the stem through the xylem to all parts of the plant.
Answer 18.
During running, his muscles needed more energy, so more oxygen was required. He breathed faster to take in more oxygen and remove more carbon dioxide.
Answer 19.
Blood leaves the heart through arteries, travels to body parts via tiny capillaries where exchange occurs, then returns to the heart through veins.
Answer 20.
- In the mouth, teeth break the bread into smaller pieces and saliva digests some starch into sugar.
- In the stomach, gastric juices continue digesting the food into simpler substances.
- In the small intestine, digestion is completed and the nutrients pass through its walls into the bloodstream.
- The blood then transports the nutrients to all body cells for energy and growth.