• the energy content of different foods
• the amount of energy required to perform different activities
• the role of oxygen in the release of energy from food
• the similarities and differences between respiration and burning
• how oxygen, glucose and carbon dioxide are transported in the blood
• how the oxygen and carbon dioxide content of air can be measured
• the daily energy requirements of different people
• the consequences of not balancing the amount of energy taken with the amount released by the body

After viewing the programme and doing relevant follow-up work pupils should be able to:

• identify some high and low energy foods
• explain why we need to take in energy
• give some examples of activities which require a large amount of energy
• explain why our bodies take in oxygen
• list the similarities and differences between respiration and burning
• write a word equation for respiration
• describe how oxygen, glucose and carbon dioxide are carried in the blood
• explain why we take in more oxygen and give out more carbon dioxide, when we exercise
• explain why some people need to take in more energy than others
• describe what happens when we take in more energy than we need