Year 10 - Science
Competition and adaptations in ecosystems
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 what plants and animals compete for, and consider how adaptations help organisms to survive and compete in their environment.
Key Notes
- Organisms compete for resources such as food, water, space, shelter, light, mates, pollinators and seed dispersers.
- The populations of species within a community are interdependent (they rely upon and affect one another).
- Organisms have adaptations that help them survive and compete in their environment.
- Adaptations can be physiological, structural or behavioural.
- Extremophiles are adapted to live in extreme environments, e.g. high salt concentration or very high or low temperature.
Vocabulary To Learn
- competition: Competition is when organisms in a community or population are seeking the same limited resource (e.g. food, mates).
- adaptation: An adaptation is a feature that organisms have to help them live in a particular place.
- physiological: Physiological adaptations are body processes that help an organism to survive and reproduce.
- microorganism: A microorganism is an organism that can only be seen using a microscope.
- extremophile: Extremophiles are organisms that are able to successfully survive and reproduce in extreme environments (e.g. very hot/very cold).
Common Mistakes To Avoid
- That organisms are able to quickly adapt to the place where they live.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Organisms compete for resources such as food, water, space, shelter, light, mates, pollinators and seed dispersers. The populations of species within a community are interdependent (they rely upon and affect one another).
2. Define this scientific word and use it in context. 'competition'
Competition is when organisms in a community or population are seeking the same limited resource (e.g. food, mates). Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: That organisms are able to quickly adapt to the place where they live. Correction: Referring to inheritance, explain that changes to organisms take time to evolve - responses to any environmental change is not instant. In some organisms, where reproduction is slow, responses can be too slow to avoid extinction.
More Lessons In This Unit
- Components of an ecosystem 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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