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Carbon dioxide concentration — OCR GCSE Combined Science A Definition

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Combined Science
Key terms
Carbon dioxide concentration

GCSE Combined Science · key term

Carbon dioxide concentration

Definition

The amount of carbon dioxide present in a given volume of air or water.

Used by OCR

How each exam board covers it

OCR GCSE Combined Science A · J250

Specification B1.4e, B1.4f · Biology Paper 1

Three important environmental factors affect this rate: light intensity, carbon dioxide concentration and temperature. They affect photosynthesis in different ways.
Revise: Factors Affecting Photosynthesis Rate
The amount of carbon dioxide in a given volume of air or solution.
Revise: Limiting Factors in Photosynthesis

OCR Combined Science A past papers

Exam tips

1
Do not say that increasing light intensity or carbon dioxide concentration always increases photosynthesis. The rate eventually levels off.

Related key terms

Light intensity
Denaturation
Limiting factor
Optimum temperature
Photosynthesis

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Rate of photosynthesis