1. Lesson Starter What are arrows A and B pointing to?
How does the tube labelled A remain open?
What are alveoli?
What features of the alveoli make them good for gas exchange? A B

2. Learning Intention
To understand the importance of oxygen in respiration
To be able to explain that energy is released during respiration
To give examples of how energy is used in your body

3. Energy
Energy can neither be converted nor destroyed- it can only be converted *watch demo*

4. Why do we need energy?

5. Why do we need energy? (copy)
Our cells need energy for a variety of functions including:
Cell division
Cell growth
Chemical Reactions
Muscular Contraction
Synthesising large molecules
Active transport
Transmission of nerve impulses

6. Energy in Food Three food groups Digestion
Fats contain most energy- harder to digest
Body uses Glucose for energy

7. This process occurs in all living things!
What is Respiration?
This process occurs in all living things!

8. Glucose + Oxygen  Carbon dioxide, water and energy
Respiration
All living organisms
Enzyme controlled
Releases energy from food
Presence/absence of oxygen
Glucose + Oxygen  Carbon dioxide, water and energy
CO2 and water= waste, breathe it out
Limewater test

9. Respiration (copy)
Respiration is the enzyme controlled chemical reaction which happens in ALL LIVING ORGANISMS in order to release the energy stored in food. Glucose + Oxygen  Carbon dioxide, water and energy We can test for carbon dioxide using lime water- carbon dioxide turns limewater from clear to “milky”

10. True or False Respiration means breathing.
Respiration occurs in all body cells.
Respiration gives out oxygen.
Carbon dioxide is used up by respiration.
Respiration is a chemical process that releases energy.
Plants do not respire.
More energy is produced when oxygen isn’t present