Lesson 14 osmosis

OSMOSIS

LESSON OBJECTIVES

1. Define and explain osmosis2. Describe factors that affect the rate of

osmosis3. Explain the role of water in supporting plants

(Triple only)

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Osmosis

OSMOSIS

http://www.youtube.com/watch?v=sdiJtDRJQEc

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Osmosis is the diffusion of water resulting in a movement of water molecules from a

region of high water concentration (dilute sugar solution) to a region of low water

concentration (concentrated sugar solution) through a partially permeable membrane until in equilibrium. It does not require

energy.

OSMOSIS

Extension:Highlight the key words

OSMOSIS EXPLAINED

THEORY.

Crenulated

http://www.google.co.uk/url?sa=i&rct=j&q=osmosis.+cells&source=images&cd=&cad=rja&docid=JBhPASWr7KijGM&tbnid=pjx3yqtyP25E6M:&ved=0CAUQjRw&url=http://kohyizhescienceeportfolio.wordpress.com/2011/08/28/term-3-second-entry-diffusion-and-osmosis/&ei=tQglUaW2BY-6hAfYxID4Dg&psig=AFQjCNGKtuSLU0Hx3I0w0X-aFvbiGMMu4Q&ust=1361467881120550

http://www.google.co.uk/url?sa=i&rct=j&q=osmosis.%20visking&source=images&cd=&cad=rja&docid=VqdE1xSLqrKtSM&tbnid=ymvQsgFBY9F5SM:&ved=0CAUQjRw&url=https://sites.google.com/a/edubuzz.org/sg-biology--investigating-cells/osmosis&ei=PQglUe_JIcHMhAflp4HQCA&psig=AFQjCNGHdd0b2lZ56EZfojUb5cvFELn4kg&ust=1361467561857452

DISCUSSION

DISCUSSION

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DemoDemo

http://www.bbc.co.uk/education/guides/zc9tyrd/revision/6

partially permeable membrane

Complete the worksheet1. Label the side of the beaker with the highest concentration of water molecules.2. Label the side of the beaker with the lowest concentration of water molecules.3. Draw arrows onto the diagram showing the direction of water movement by osmosis.4. Explain why the water molecules move in this direction.5: Explain the role of water in supporting plant tissue

SugarWater

OSMOSIS ACTIVITY

Education

Lesson 14 osmosis