The role of microorganisms in decomposition
I can explain the role of microorganisms and detritus feeders in decomposition.
- Year 10
- AQA
The role of microorganisms in decomposition
I can explain the role of microorganisms and detritus feeders in decomposition.
Lesson details
Key learning points
- Microorganisms and detritivores (detritus feeders) are responsible for the decomposition of plant and animal material.
- Decay is needed to keep nutrients cycling around an ecosystem.
- Compost is made out of decomposed plant and animal material.
- Biogas is produced when waste material is anaerobically digested.
- Biogas contains methane which can be harvested and used as a fuel.
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).
Decay - Decay is the breakdown (or rotting) of organic matter by bacteria, fungi, or other organisms.
Detritus - Detritus is the remains of living organisms.
Enzyme - An enzyme is a protein that acts as a biological catalyst (a substance that speeds up a reaction).
Common misconception
Decomposers release energy that is recycled back to plants.
Decomposers break down dead organisms and waste. This returns minerals to the soil which can be used by plants. It is worth stating that some decomposers are eaten by carnivores as part of food chain diagrams that include decomposers.
Equipment
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.What is a community?
Q2.Which of the following are examples of only abiotic factors?
Q3.Which of these is a behavioural adaptation seen in some animals?
Q4.What is interdependence?
Q5.What is meant by the term decomposition?
Q6.Which of the following is not an example of a biotic factor?
Assessment exit quiz
6 Questions
Q1.What is the name of the flammable gas found in biogas?
Q2.What is an organism that feeds on waste or dead organic matter called?
Q3.Nitrates are released into the soil by decomposers when they breakdown waste and dead organisms. Why is it important that the nitrates are released into the soil?
Q4.Biogas is made during the decomposition of manure or crops (e.g. maize) in anaerobic conditions. What does the term anaerobic refer to?
Q5.Match the words with the correct description.
