P3 Science · Chapter 6brightbit.net/worksheets
The Plant System — Photosynthesis and Respiration
Name: ______________________Class: ________Date: ____________Score: ____ / 10
- 1.
What are the THREE things a plant needs to carry out photosynthesis?
(a) Sunlight, water and carbon dioxide(b) Sunlight, oxygen and sugar(c) Water, oxygen and minerals(d) Carbon dioxide, sugar and soil
- 2.
What are the products of photosynthesis?
(a) Glucose (food) and oxygen(b) Carbon dioxide and water(c) Starch and carbon dioxide(d) Oxygen and minerals
- 3.
Where in a plant cell does photosynthesis take place?
(a) Chloroplasts (containing chlorophyll)(b) Nucleus(c) Cell wall(d) Roots
- 4.
A plant is kept in a dark room for several days. What will happen to the rate of photosynthesis?
(a) It will stop because there is no sunlight(b) It will increase(c) It will stay the same(d) It will slow down slightly but continue
- 5.
Do plants respire (release energy from food)?
(a) Yes, all the time — day and night(b) No, only animals respire(c) Yes, but only at night(d) Yes, but only during photosynthesis
- 6.
During respiration, plants take in ___ and release ___.
(a) Oxygen; carbon dioxide(b) Carbon dioxide; oxygen(c) Water; oxygen(d) Glucose; water
- 7.
During the day, a plant is placed in sunlight. Which TWO processes are happening at the same time?
(a) Photosynthesis and respiration(b) Photosynthesis only(c) Respiration only(d) Digestion and respiration
- 8.
Why do plants appear to only release oxygen during the day?
(a) Photosynthesis produces more oxygen than respiration uses during the day(b) They stop respiring during the day(c) They store oxygen during the day(d) Respiration does not use oxygen
- 9.
State the word equation for photosynthesis.
- 10.
A plant is covered with a black plastic bag for a week. The leaves turn yellow. The most likely reason is:
(a) No sunlight means no photosynthesis, so the plant cannot make food or chlorophyll(b) The bag causes overheating(c) The roots cannot absorb water(d) There is too much carbon dioxide
Answer key — P3 Science: The Plant System — Photosynthesis and Respiration
For parents. Step-by-step explanations for every question are free on brightbit.net.
- 1.(a) Sunlight, water and carbon dioxide
- 2.(a) Glucose (food) and oxygen
- 3.(a) Chloroplasts (containing chlorophyll)
- 4.(a) It will stop because there is no sunlight
- 5.(a) Yes, all the time — day and night
- 6.(a) Oxygen; carbon dioxide
- 7.(a) Photosynthesis and respiration
- 8.(a) Photosynthesis produces more oxygen than respiration uses during the day
- 9.Carbon dioxide + water → glucose + oxygen
- 10.(a) No sunlight means no photosynthesis, so the plant cannot make food or chlorophyll
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