P5 Science · Chapter 15brightbit.net/worksheets
Photosynthesis
Name: ______________________Class: ________Date: ____________Score: ____ / 10
- 1.
What do plants need to carry out photosynthesis?
(a) Sunlight, water, and oxygen(b) Sunlight, water, and carbon dioxide(c) Oxygen, glucose, and water(d) Carbon dioxide, glucose, and sunlight
- 2.
What are the two main products of photosynthesis?
(a) Carbon dioxide and water(b) Glucose and carbon dioxide(c) Glucose and oxygen(d) Oxygen and water
- 3.
What is the green pigment in leaves that traps sunlight for photosynthesis?
(a) Cellulose(b) Chlorophyll(c) Carbon dioxide(d) Glucose
- 4.
Which part of the plant is the main site of photosynthesis?
(a) Roots(b) Stem(c) Leaves(d) Flowers
- 5.
Why are most leaves broad and flat?
- 6.
A plant is placed in a dark cupboard for several days. What will happen to it and why?
- 7.
Which gas do plants take in from the air during photosynthesis?
(a) Oxygen(b) Nitrogen(c) Carbon dioxide(d) Hydrogen
- 8.
How does photosynthesis benefit animals and humans?
- 9.
Where does a plant get the water it needs for photosynthesis?
(a) From the air through its leaves(b) From the soil through its roots(c) From sunlight(d) From other plants nearby
- 10.
A student covers one leaf of a plant with aluminium foil and leaves another leaf uncovered. After a few days, she tests both leaves for starch. What result would she expect and why?
Answer key — P5 Science: Photosynthesis
For parents. Step-by-step explanations for every question are free on brightbit.net.
- 1.(b) Sunlight, water, and carbon dioxide
- 2.(c) Glucose and oxygen
- 3.(b) Chlorophyll
- 4.(c) Leaves
- 5.To absorb as much sunlight as possible for photosynthesis
- 6.The plant will become weak and may die because without sunlight it cannot carry out photosynthesis to make food (glucose)
- 7.(c) Carbon dioxide
- 8.Photosynthesis produces oxygen that animals and humans need to breathe, and produces food (glucose) that is the basis of food chains
- 9.(b) From the soil through its roots
- 10.The uncovered leaf will contain starch but the covered leaf will not, because the covered leaf had no sunlight and could not photosynthesise to produce glucose (which is stored as starch)
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