How do our cells get energy
By Alice Leung
Created 2 years ago
This is an activity for a Year 7 science class to introduce respiration in cells.
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Slide 1 - How do our cells get energy?
- Year 7 science
Slide 2 - What you will learn
- By the end of this activity, you will be able to:
- give the meaning for respiration
- identify what is needed for respiration
- identify what is released for respiration
- describe what respiration does for cells
- write the equation for respiration
Slide 3 - Respiration
- All organisms (living things) need a constant supply of energy.
- This energy comes from food.
- When food is digested or broken down, it becomes glucose.
- Energy is released when glucose is combined with oxygen.
- In the cells of organisms, glucose and oxygen combines to release energy. Water and carbon dioxide are also released.
- This process is called respiration.
- carbon dioxide
Slide 4 - What is the role of respiration
- Respiration provides cells with the energy they need to carry out their activities.
- For example, the energy from respiration allows:
- a nerve cell to carry electrical messages around the body
- a heart cell to continue beating
- a white blood cell to fight germs
- Respiration gives cells the energy to keep an organism alive.
Slide 5 - Equation for respiration
- In science, respiration can be represented by an equation.
- Instead of writing ‘When glucose is combined with oxygen, it releases energy, carbon dioxide and water’, we can write an equation instead.
- glucose + oxygen energy + carbon dioxide + water
Slide 6 - Test your understanding of respiration – Q1
Slide 7 - Test your understanding of respiration – Q2
Slide 8 - Test your understanding of respiration – Q3
Slide 9 - Test your understanding of respiration – Q4
Slide 10 - Test your understanding of respiration – Q5