Name
Class
Date
What is photosynthesis?
Lesson Review
Complete the following.
1. In photosynthesis, plants use energy from the Sun to make _____________________________________ .
2. In photosynthesis, light energy is converted into ________________________________________ energy.
3. Sunlight is absorbed mostly by the _________________________________________________ of a plant.
4. The substance in a leaf that absorbs sunlight is called __________________________________________ .
5. This substance absorbs all colors of light except ___________________________________________ light.
6. As the Sun moves across the sky, the leaves of a plant will _____________________________________ .
7. Light energy can be converted to heat energy, __________________________ energy, chemical energy,
or other forms of energy.
8. Plant leaves look green because _____________________________________________________________ .
Skill Challenge
Skills: interpreting diagrams, relating, analyzing
The diagram and equation below show the process of photosynthesis in plants.
Study the diagram and equation. Then, answer the questions.
1. According to the equation, what is needed
in order for photosynthesis to take place?
_______________________________________
2. What products are produced by
photosynthesis? ________________________
_______________________________________
3. How does water enter a plant? How does
it reach the leaf? ________________________
_______________________________________
4. What is a plant’s source of carbon dioxide?
How does carbon dioxide enter the leaf?
_______________________________________
5. How does sunlight enter the leaf of a plant? ___________________________________________________
___________________________________________________________________________________________
6. How is oxygen released by the leaf? __________________________________________________________
___________________________________________________________________________________________
Concepts and Challenges in Physical Science, Teacher’s Resources CD-ROM
(c) by Pearson Education, Inc./Globe Fearon/Pearson Learning Group. All rights reserved.
Light
Answer Key
What is photosynthesis?
Lesson review
1. food 2. chemical 3. leaves 4. chlorophyll
5. green 6. move to continue facing the Sun
7. electrical 8. chlorophyll in the leaves is green
Skill Challenge
1. carbon dioxide, water, and energy from the Sun
2. sugar and oxygen 3. It enters through roots in the
soil. Then, it travels up the stem to the leaf. 4. The
source of carbon dioxide is the air; carbon dioxide
enters through stomata on the underside of the leaf.
5. It is absorbed by the leaf. 6. through the stomata
on the underside of the leaf
Concepts and Challenges in Physical Science, Teacher’s Resources CD-ROM
(c) by Pearson Education, Inc./Globe Fearon/Pearson Learning Group. All rights reserved.
Light