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Science topics ages 9 - 10
Keeping healthy
Curriculum relevance |
Online lesson plan
Offline lesson plan |
Worksheet |
Activity |
Quiz
Online lesson plan
Objectives
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
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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
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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
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Teaching activities
Introduction
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)?
Activities
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.
Plenary
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.
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Extension
Ask children to complete the online quiz, researching any answers they are
unsure of in secondary sources.
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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.
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