Animals incl. Humans – Block 3AH Science - Year 3 Animals incl. Humans – Block 3AH Keeping Healthy Session 4 Task PowerPoint © Original resource copyright Hamilton Trust, who give permission for it to be adapted as wished by individual users. We refer you to our warning, at the foot of the block overview, about links to other websites.

Do some people have stronger muscles because they use them more? 1. The question we want to investigate is … Do some people have stronger muscles because they use them more? Do not worry if you were not able to do many swap jumps. Everyone is important in a science investigation because everyone is different and everyone is special!

2. In science, your hunch is called a prediction What is your hunch? Discuss it in your group In science, your hunch is called a prediction Write your prediction on your group task sheet Scientists almost always have a reason for making their prediction. It is called a theory or hypothesis. Think about the reason for making your prediction and write it on your task sheet.

3. When they investigate questions, scientists need to collect data. What data do we already have on how strong people’s leg muscles are? The number of swap jumps each person could do before their muscles became tired.

4. So is there a link between the number of jumps people could do and the amount of regular physical activity or sport they do?

5. Talk in your group about how you can collect data on this. Try to think of something you can count. It’s time to share your ideas

6. You might have thought of these: The number of sport sessions or clubs they go to each week Or -The number of hours they spend doing sport or physical activity each week

You might have thought of a different way to measure the amount of activity they do 7. In your group you need to agree: What data you will collect. How you will put your data into a table How will you share out the task of collecting the data? It’s time to start researching!

Do some people have stronger muscles because they use them more? 8. It’s time to look at our data to see if our prediction is correct on our question… Do some people have stronger muscles because they use them more?

A Scattergram can help us to look for patterns in data A Scattergram can help us to look for patterns in data. You need 2 axes, one for each type of data you collected. Draw a pair of axes on your flip chart. Label the vertical axis – Number of Jumps. Label the horizontal axis with the type of data you collected. Number of Jumps

e.g. Number of 1 hour sports sessions a week You may need to choose a scale for your vertical axis, this one goes up in 2s. Come up to the flip chart 2 or 3 at a time and make a cross to show your own data point. 16 14 This person does 3 hours of sport a week and did 11 swap jumps 12 Number of Jumps 10 8 How many hours of sport a week does this person do? And how many swap jumps? 6 4 2 1 2 3 4 5 6 e.g. Number of 1 hour sports sessions a week

Once everyone has added a cross to the scattergram to show their data point, you can look for a rough pattern. This line shows more Jumps with more sessions! One of these scattergrams shows no link between the number of swap jumps and the amount of sport done each week, whilst the other shows there is a link. Can you tell which is which?

Is there any pattern to your data? What does this show? Was your prediction right? Why might this be?