1. Starter On paper to hand in (names on) What is the difference between resolution and magnification?

2. Learning objectives Recall maximum magnification and resolution of a light, transmission electron and scanning electron microscope Explain how these microscopes work Identify advantages and disadvantages of each type of microscope

3. Extraction of information Using 1.The very old AS textbook 2.The 3 biological review articles Complete a table of the following information T:\Science\1.NEW T DRIVE\Key stage 5\Biology\2008 Spec\AS\F211 Cells, Exchange and Transport\1.1 Cell structure\5.1.1 lesson2blank summary table.doc

4. How did you do? T:\Science\1.NEW T DRIVE\Key stage 5\Biology\2008 Spec\AS\F211 Cells, Exchange and Transport\1.1 Cell structure\5.1.1 lesson2 summary table.docT:\Science\1.NEW T DRIVE\Key stage 5\Biology\2008 Spec\AS\F211 Cells, Exchange and Transport\1.1 Cell structure\5.1.1 lesson2 summary table.doc Why did I get you to extract the information yourself and not just give you it?

5. Current values from Heinemann TypeMax resolutionMax magnification Light200nmX1500 Transmission electron 0.1nmX500,000 Scanning electron 0.1nmX100,000

6. How do you get colour electron micrographs? Computer software has been used to colour the separate parts of the image

7. Plenary On the sheet given allocate light, transmission, and scanning to each statement Statements are advantages of each Hand in name on

8. Answers 1.Light 2.SEM + TEM 3.SEM 4.Light 5.SEM + TEM 6.SEM + TEM 7.SEM + TEM 8.SEM + TEM

9. Homework Complete allocated questions on the exam question pack Hand in Wed to Mrs Rochelle Revision of all work for test next Wed in Mrs Rochelle’s lesson