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Science at key stage 3    (Year 8)

Unit 8B: Respiration
Section 12: b. Do other organisms respire in a similar manner?

QCA

Objectives
Children should learn:
  • that plants and other animals produce carbon dioxide during respiration
  • to make careful observations and draw conclusions explaining these in terms of scientific knowledge and understanding
  • to use scientific terminology effectively and accurately in writing

Activities

Outcomes
Children:
  • Help pupils to carry out the investigation they planned. Compare results from different investigations and ask the pupils to identify any trends, eg plant material produced less carbon dioxide than animal material, the more active animals produced more carbon dioxide.
  • Draw together the results of the investigations and establish respiration as a process that takes place in the cells of plants and animals.
  • recognise that other living things, including plant material, produce carbon dioxide during respiration
  • integrate the results of others with their own to draw conclusions
  • identify and describe patterns in the data

Points to note
  • Pupils should consider the welfare of small invertebrates.
  • It may be necessary to leave the plant investigations set up for a longer period of time. Pupils will need to take this into consideration in any comparison of results.
  • Photosynthesis is covered in unit 9C 'Plants and photosynthesis'. Pupils often think that plants photosynthesise but do not respire. It is helpful to emphasise that plants do respire before photosynthesis is studied.

    • Safety

    • wash hands and wipe the bench with disinfectant after handling live material

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. How do cells use the food molecules absorbed after digestion?
2. b. How do cells use the food molecules absorbed after digestion?
3. c. How do cells use the food molecules absorbed after digestion?
4. d. How do cells use the food molecules absorbed after digestion?
5. a. How does the oxygen needed for respiration reach the tissues of the body?
6. b. How does the oxygen needed for respiration reach the tissues of the body?
7. What happens to the oxygen when it reaches the cells?
8. Checking progress
9. What is the role of the lungs?
10. How are inhaled and exhaled air different?
11. a. Do other organisms respire in a similar manner?
12. b. Do other organisms respire in a similar manner?
13. Reviewing work