Factors affecting the rate of decomposition
I can explain why some factors affect the rate of decomposition by microorganisms.
Factors affecting the rate of decomposition
I can explain why some factors affect the rate of decomposition by microorganisms.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Microorganisms use enzymes to decompose biological material.
- The rate of decomposition is affected by temperature, which affects the rate of enzyme-controlled reactions.
- The rate of decomposition is affected by the availability of water, which microorganisms need to survive.
- The rate of decomposition is affected by the availability of oxygen to aerobic and anaerobic microorganisms.
Keywords
Microorganism - A microorganism is an organism that can only be seen using a microscope.
Decomposer - A decomposer is an organism that feeds on the remains of other living organisms (organic matter).
Enzyme - A protein which acts as a biological catalyst. This speeds up a reaction without being used up.
Rate - The rate is how quickly something takes place. The rate of a reaction is a measure of how much change occurs per unit of time.
Aerobic - Aerobic means in the presence of oxygen.
Common misconception
Research has found that pupils generally do not appreciate the important roles of microorganisms in decomposition and the recycling of elements. Many associate microorganisms only with disease.
The lesson outlines the factors that are important in recycling of elements but also that microorganisms are the natural cleaners of the environment.
Equipment
None required.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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