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Science at key stage 3    (Year 9)

Unit 9D: Plants for food
Section 10: c. How do pests affect plant growth?

QCA

Objectives
Children should learn:
  • to recognise the standpoint of the author of a text
  • to evaluate how effectively information is presented in whole texts
  • to evaluate conflicting evidence to arrive at a considered viewpoint

Activities

Outcomes
Children:
  • Use the examples above to draw out issues and ask pupils to reflect on questions, eg
    • Why are pesticides used?
    • Are there alternatives?
    • Who develops alternative, less harmful pesticides?
    • What could be done to protect vulnerable populations such as birds?
    • Should pesticides be used to produce more food for humans at the expense of other animals?
    • How are pests managed on organic farms?
  • describe the views of different people who write about pesticides
  • identify advantages and disadvantages of pesticides, and people to whom each will be important

Points to note
  • Teachers may wish to develop their own secondary sources or case studies based on local or current events.
  • Development of pesticides links with making new materials in unit 9H 'Using chemistry'.

Sections in this unit

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This unit is divided into sections. Each section contains a sequence of activities with related objectives and outcomes. You can view this unit by moving through the sections or print/download the whole unit.
1. a. Where does our food come from?
2. b. Where does our food come from?
3. Checking progress
4. a. How do fertilisers affect plant growth?
5. b. How do fertilisers affect plant growth?
6. a. How does competition with other plants affect plant growth?
7. b. How does competition with other plants affect plant growth?
8. a. How do pests affect plant growth?
9. b. How do pests affect plant growth?
10. c. How do pests affect plant growth?
11. a. What is the perfect environment for growing plants?
12. b. What is the perfect environment for growing plants?
13. Reviewing work