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20 October 2014
Schools  >> All subjects for ages 4 - 11 years Science Clips
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Science topics ages 9 - 10
Keeping healthy

Curriculum relevance | Online lesson plan
Offline lesson plan | Worksheet | Activity

Online lesson plan


Know that when muscles are doing more work they need more oxygen

Understand that blood supplies muscles with oxygen

Know that to get more blood to the muscles, the heart beats faster, and so the heart rate or pulse rate increases

National Curriculum

England: Key Stage 2, Science, Sc2 2c, 2d

Wales: Key Stage 2, Life processes and living things 2.4, 2.5, 2.6, 2.7

Northern Ireland: Key Stage 2, Living things, Ourselves, e

Scotland: 5-14 Guidelines, Science, The processes of life, Level C

Resources required

Online activity from Science Clips website: Keeping Healthy

Large labels of ‘heart’. ‘blood’, ‘lungs’, ‘oxygen’ and ‘muscles’

Selection of secondary sources such as books or CD-Roms

Teaching activities

Display the labels. Recap how the words are linked. What gas is carried in the blood (oxygen)? What do muscles need to work (oxygen)? What is the heart’s job (to pump blood around the body)? Where does the blood go and why (it goes around the body dropping off oxygen and picking up carbon dioxide)?

Explain that when a muscle is working or exercising, it needs oxygen to work.

Ask children to move one arm up and down. Which muscle needs oxygen for this? How does your heart feel? If you move your arm up and down faster, will the muscle need more or less oxygen? How does your body get more oxygen to the muscle (your heart beats faster)? How can we measure this (pulse rate)?

Bring up the online activity on the interactive whiteboard. Show how to make the girl carry out different activities, and point to where her heart rate is displayed. Ask children to predict when the girl’s heart will beat faster and why. Arrange the children in pairs or groups, with a computer for each group. Ask children to work through the online activity, following the tasks written (and spoken) at the top of the screen. They should record any results on paper.

Were the children’s predictions correct? Why did the girl’s heart beat fast when she was running? What was the blood carrying to the muscles to help them work? Which muscles were working hardest? What effect did this have on the girl’s heart rate?

Repeat this questioning for each of the girl’s activities.


Ask children to complete the online quiz, researching any answers they are unsure of in secondary sources.

Suggested homework

Ask children to measure and record their pulse rate when they are doing different activities and to write down which muscles are working hardest in each case.


Resources for teachers

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