Title: Factors affecting photosynthesis - light intensity - Photosynthesis - Edexcel - GCSE Biology (Single Science) Revision - Edexcel - BBC Bitesize
Headings: Factors affecting photosynthesis - light intensity
Photosynthesis
Part of
Add to My Bitesize
Factors affecting photosynthesis - light intensity
Light intensity
GCSE Subjects
GCSE Subjects
up
down

Content: Factors affecting photosynthesis - light intensity - Photosynthesis - Edexcel - GCSE Biology (Single Science) Revision - Edexcel - BBC Bitesize
Bitesize
All Bitesize
Change language
English
Cymraeg
Gaeilge
Gàidhlig
Home
Learn
Support
Careers
My Bitesize
All Bitesize
GCSE
Edexcel
Photosynthesis
Green plants and algae use light energy to make glucose and oxygen from carbon dioxide and water. Temperature, carbon dioxide concentration and light intensity can affect the rate of photosynthesis. Part of
Biology (Single Science)
Plant structures and their functions
Add to My Bitesize
Share this with
Twitter
Facebook
WhatsApp
Copy link
Read more about sharing
Revise
video
Video
quiz
Test
previous
1
2
3
4
5
6
7
8
Page 2 of 8
next
Factors affecting photosynthesis - light intensity
There are several ways of measuring the rate of photosynthesis in the lab. These include: the rate of oxygen production (number of bubbles or volume of oxygen gas given off in a set time)
the rate of carbon dioxide uptake
the rate of glucose production
Several factors can affect the rate of photosynthesis: light intensity
carbon dioxide concentration
temperature
Light intensity
Without enough light, a plant cannot photosynthesise very quickly - even if there is plenty of water and carbon dioxide. Increasing the light intensity increases the rate of photosynthesis, until some other factor - a limiting factor - becomes in short supply. previous
next
previous
next
previous
next
previous
next
The rate of photosynthesis is directly proportional to the light intensity until another factor becomes limiting. At very high light intensities, photosynthesis is slowed, but these light intensities do not occur in nature. previous
1
2
3
4
5
6
7
8
Page 2 of 8
next
up
down
GCSE Subjects
GCSE Subjects
up
down
Art and Design
Biology (Single Science)
Business
Chemistry (Single Science)
Combined Science
Computer Science
Design and Technology
Digital Technology (CCEA)
Drama
English Language
English Literature
French
Geography
German
History
Home Economics: