Rawdah High School
Subject: Science Quiz
Class: (5 A, B, C)
Name: ___________________
Academic Year 2023/2024
Duration: 15 min
Date: _______________
Plants grow in the direction where they can absorb more light. In order to prove this, Charles
Darwin conducted an experiment to show how plants move toward the direction of light.
1. Pick out, the aim of this experiment. (1pt)
2. Indicate the control plant and its role. (1pt)
3. Which plants show phototropism? (1pt)
4. Why didn’t the other plants show phototropism? (1pt)
5. Indicate the importance of phototropism for plants. (1pt)
Answer key:
1.
2.
3.
4.
To show how plants move in the direction of light.
A is the control plant used for comparison at the end of the experiment.
A and D
B and C don’t show phototropism since the tip is either cut or isolated from light so that auxin at the
tip of the shoot doesn’t respond to light.
5. It’s important to bend to light in order to get maximum amount of light needed for photosynthesis.