Year 10 - Science
Components of an ecosystem
Living organisms and their environments
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit explores ecosystem organisation, biotic and abiotic factors, material cycling, and the role of decomposers. It covers methods for identifying species and measuring their distribution. Emphasis is on selecting appropriate techniques, accurate measurements, sampling, and fieldwork practices.
Lesson Summary
You will learn to describe how changes in abiotic and biotic factors affect organisms in an ecosystem including how the size of predator and prey populations are cyclical.
Key Notes
- Ecosystems contain biotic and abiotic components.
- Changes in biotic and abiotic factors will affect communities within an ecosystem.
- Predators are consumers that eat prey.
- The population sizes of predators and prey increase and decrease in predator-prey cycles.
Vocabulary To Learn
- ecosystem: An ecosystem is made up of all the living organisms in a place, interacting with each other and their non-living surroundings.
- population: A group of organisms of the same type in the same place is called a population.
- community: A community is made up of all the organisms that live in the same place.
- biotic: Biotic factors are the living components of an ecosystem.
- abiotic: Abiotic factors are the non-living components of an ecosystem.
Common Mistakes To Avoid
- Varying the population size of an organism will not affect an ecosystem.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Ecosystems contain biotic and abiotic components. Changes in biotic and abiotic factors will affect communities within an ecosystem.
2. Define this scientific word and use it in context. 'ecosystem'
An ecosystem is made up of all the living organisms in a place, interacting with each other and their non-living surroundings. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Varying the population size of an organism will not affect an ecosystem. Correction: All organisms are important within an ecosystem. If one organism's population size changes, either as a result of a biotic factor (predation / disease) or an abiotic factor, it will affect all organisms within the ecosystem (to varying degrees).
More Lessons In This Unit
- Competition and adaptations in ecosystems Study Guide
- Estimating population size and distribution using transects: practical Study Guide
- Estimating population size using quadrats: practical Study Guide
- Factors affecting the rate of decomposition Study Guide
- Material cycles: the carbon cycle Study Guide
- Material cycles: the water cycle Study Guide
- Measuring the size and distribution of populations of organisms Study Guide
- The effect of temperature on the rate of decomposition by an enzyme: data analysis and evaluation Study Guide
- The effect of temperature on the rate of decomposition by an enzyme: practical Study Guide
- The role of microorganisms in decomposition Study Guide
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