Environmental Factors Affecting Living Organisms

Environmental factors affecting living organisms refer to external conditions that influence the survival, growth, and reproduction of organisms. They can be categorised as:

Biotic factors (living factors)
Abiotic factors (non-living factors)
Edaphic factors (factors relating to soil)
Aquatic factors (factors relating to water)
Climatic factors (factors that concern weather over a long period of time)

Biotic factors (living factors)	Abiotic factors (non-living factors)	Edaphic factors (factors relating to soil)	Aquatic factors (factors relating to water)	Climatic factors (concern weather over a long period of time)
Competition	Soil pH	Temperature	Water currents	Soil temperature
Predation	Light intensity	Rainfall	Oxygen content	Soil pH

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You might be asked to identify the equipment used to measure an environmental factor. Here are some examples:

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Temperature

Measured using a thermometer.

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Light intensity

Measured with a light meter (also known as a lux meter).

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Soil pH

Measured using a pH meter of pH test kit.

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Oxygen content

Measured using a dissolved oxygen meter.

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Rainfall

Measured with a rain gauge.

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