episode 4: osmosis enquiry
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Cell Expo. Cell Expo Osmosis Enquiry. Episode 4: Osmosis Enquiry. 1. Objectives:. Plan and carry out a simple scientific enquiry. Cell Expo Osmosis Enquiry. 2. - PowerPoint PPT PresentationTRANSCRIPT
Episode 4:Osmosis Enquiry
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osis Enquiry
• Plan and carry out a simple scientific enquiry
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Scientists find things out by carrying out scientific enquiries.I am going to help you to carry out a scientific enquiry into osmosis.You will investigate how the concentration of glucose in the solution affects how far the water moves up the tube. But before you start some things to think about.
What am I going to investigate?
What could I change?
What are the key variables?
What will I change - my independent variable.
What do I think will happen?
Why do I think that? This is my hypothesis.
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How will I measure my dependent variable?
How can I change my independent variable?
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What equipment will I need?
How can I make sure my results are reliable?
What will I need to keep the same - my control variables? And how can I do that?
How can I make my enquiry safe?
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I need to see your plan before you start work. You will need to show me a diagram or some notes - I can’t just listen to you talk!
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You are now ready to start your enquiry. A bit of advice for you.•Take care when you take your readings - they need to be accurate.•A table of results is useful for collecting data - draw one up before you start your investigation.•You may need to carry out calculations on your data. Make sure you know how to do these.
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You now need to interpret your results and draw conclusions from them. •How will you process and display your results? Would a graph or chart help?•What patterns can you see in your results?•How could you explain your results?•What can you conclude from your enquiry?
It is important to evaluate your enquiry•Were your results what you expected?•Were there any results that didn’t fit the pattern?•How could this have happened?•Did you make sure you kept everything accurately the same every time? How?•Did you make sure your measurements were accurate each time? How?•How could you improve your investigation?•What further investigations would you like to carry out?
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Well done! That is your enquiry completed!You now need to write a report.
