Food and ecosystems - Free response questions
Free response questions will appear throughout both exam papers (Breadth and Depth), and at both Foundation tier and Higher tier.
These questions provide answer lines for you to write your answer, and may sometimes also provide a blank space for you to draw a diagram or show your working out.
The number of answer lines and the number of marks for the question are guides to the amount of detail to include in your answer. A question worth 1 mark with only one answer line probably only requires a one-sentence answer, or perhaps just a single word or phrase. For questions with more marks and more answer lines you will have to go into more detail or give specific data points, eg:
- the number of deaths from cardiovascular disease increased [1 mark]
- the number of deaths from cardiovascular disease increased by 50% [2 marks]
Free response questions often start with a command word such as 'describe' or 'explain'. It's important to understand the different types of answers required by 'describe' and 'explain'. As a rule of thumb:
- describe what happens, when and where
- explain how and why it happens ('it happens because…')
Other command words you might see include:
- 'write down' (give a short answer, without explaining it)
- 'suggest' (use your scientific knowledge and understanding to give a sensible answer in an unfamiliar context)
- 'compare' (write about the similarities and differences between two things)
- 'discuss' (write about the issues related to a topic, and talk about arguments for and against)
These questions have been written by Bitesize consultants as suggestions to the types of questions that may appear in an exam paper.
Sample question 1 - Foundation
Question
Describe how plants absorb mineral salts from the soil? [2 marks]
Two from:
- through their roots
- by active transport
- from low concentration in the soil to high concentration in the plant
- using energy (from respiration)
Sample question 2 - Foundation
Question
Here is a woodland food chain.
Tree → Caterpillar → Sparrow → Sparrowhawk
Name one carnivore in this food chain. [1 mark]
Sparrow or sparrowhawk
Sample question 3 - Foundation
Question
What type of organisms are collected in a pitfall trap? [1 mark]
Small mammals and invertebrates are collected in a pitfall trap.
Question
What type of organisms are collected in a pooter? [1 mark]
Insects are collected in pooters.
Sample question 4 - Higher
Question
The diagram below shows the numbers of Canadian lynx and snowshoe hare populations over one hundred years.
Explain why repeating patterns are seen in this graph [4 mark]
- The number of prey increases (often in spring when more resources are available).
- The number of predators increases because there is more prey.
- The number of prey then reduces because there are more predators.
- The number of predators then reduces because there is less prey.
Sample question 5 - Higher
Question
Define both translocation and transpiration. Include the names of conducting tissues involved in your answer. [2 marks]
Transpiration is the movement of water through xylem vessels from plant roots to their leaves for photosynthesis. [1 mark]
Translocation is the movement of sugar (dissolved in water) made in photosynthesis through phloem to all cells of a plant. [1 mark]
Sample question 6 - Higher
Question
People who grow vegetables in their garden use compost and manure to help maximise the yield.
Explain the similarities and differences between manure and compost. [3 marks]
Both are made by decomposition. [1 mark]
Manure is made from solid animal waste (faeces). Compost is made from dead plant material. [1 mark]
Both fertilise the soil by providing key minerals and nutrients. [1 mark]
More guides on this topic
- What happens during photosynthesis? - OCR 21st Century
- How do producers get the substances they need? - OCR 21st Century
- How do producers transport substances they need? - OCR 21st Century
- How are organisms in an ecosystem interdependent? - OCR 21st Century
- How are levels maintained within an ecosystem? - OCR 21st Century
- How are populations affected by conditions in an ecosystem?