C1.6 Plant oils and their uses.

Starter! List as many uses of plants as you can. State what part of the plant is used and what it is used for. E.g. Potatoes (starch storage organ) are used for crisps, chips etc.

Objectives to describe the ways in which oils can be extracted from plants. to explain why vegetable oils are important. to describe the test for unsaturated oils and what to look for.

Task! Draw and label a diagram of the apparatus required to extract oil by steam distillation. Write a paragraph explaining how the process works.

Liebig condenser

Activity! Work in small groups to extract oil from peanuts and/or walnuts. Discuss how the process works in groups and then Work independently of each other to produce a diagram of the process with a written description of how the process works.

Skills needed for Science practical group work Sharing decision making: e.g. not always insisting on having one’s own way but negotiating about what to do, where to go Be able to listen and show an interest in what the other person or other group has to say. Be able to take turns when using equipment and make appropriate contributions. Evaluate the investigation, how can results be improved? Show sensitivity to others’ feelings when communicating. Spend time planning the practical before you collect any equipment. Have your results table ready before you start. Be systematic in recording your results as you proceed through the investigation. Everyone needs to record their own results. Agree which role you are responsible for today. 1) Timer 2) Safety Officer 3) Recorder 4) Equipment Officer Be able to review the team’s results and decide how best to display them. What conclusion can you draw from your results? Be prepared to feed back to the rest of the class as a group. AfL

Take turns using equipment KEYS TO SUCCESS Respecting the right of others to contribute and to learn practical skills. Resisting the tendency to take over the practical and allow others to use the equipment. Knowing when you have had your turn. Building on contributions made by others and showing your appreciation. QUESTIONS FOR CHECKING PROGRESS Why is taking it in turns to talk or use equipment such an important skill to learn? What does it feel like to be ignored or not allowed to join in when it’s your turn to use the apparatus? How does this activity link to the skill of being a team learner? Why is it important to make sure that everyone is able to develop their practical skills?

Review results and conclusions KEYS FOR SUCCESS Check the results for obvious errors. Discuss which type of graph to use. Go to another group and find out if you have similar results. Use scientific vocabulary to write a conclusion. Explain the conclusion using scientific theory. Use connectives to join ideas together. QUESTIONS FOR CHECKING PROGRESS Do you have a full set of results? Are the results similar? Which type of graph should we use? Do the results follow a pattern? What does the pattern mean? Have I explained my ideas clearly, is my conclusion logical or easy to follow?

Activity! Work in small groups to extract oil from peanuts and/or walnuts. Discuss how the process works in groups and then Work independently of each other to produce a diagram of the process with a written description of how the process works.

Homework! Produce a leaflet or poster explaining how olive oil is made. Science first, aesthetics second! On PlannerLive

Question Where does the oil come from?

Photosynthesis CO 2 + H 2 0 C 6 H 12 O 6 + O 2 Glucose is being produced from water and carbon dioxide. Glucose is then turned into other chemicals that the plants need e.g. oils. 66 6

Seven minute mind stretch! Split yourselves into groups of four. Pair A: What are the advantages and disadvantages of vegetable oils as food stuff? Pair B: What are the advantages and disadvantages of using biofuels as a fuel? Each pair then has 1 minute to explain their answers to the other pair 5 minutes 2 minutes

Activity! Work in pairs to test oils for unsaturation. spot the link

Skills needed for Science practical group work Sharing decision making: e.g. not always insisting on having one’s own way but negotiating about what to do, where to go Be able to listen and show an interest in what the other person or other group has to say. Be able to take turns when using equipment and make appropriate contributions. Evaluate the investigation, how can results be improved? Show sensitivity to others’ feelings when communicating. Spend time planning the practical before you collect any equipment. Have your results table ready before you start. Be systematic in recording your results as you proceed through the investigation. Everyone needs to record their own results. Agree which role you are responsible for today. 1) Timer 2) Safety Officer 3) Recorder 4) Equipment Officer Be able to review the team’s results and decide how best to display them. What conclusion can you draw from your results? Be prepared to feed back to the rest of the class as a group. AfL

Spend time planning KEYS TO SUCCESS Make a prediction. Identify the Independent Variable Identify the Dependent Variable Decide which variables will you control and how will you do this. You need to measure carefully using accurate equipment. Think about the reliability of your results. QUESTIONS FOR CHECKING PROGRESS Why do we think this will happen, what is the scientific theory? Have we collected a Planning Sheet to help us to plan the investigation? What equipment will we use? Will we carry out any repeats or share results with another group?

Record your own results KEYS TO SUCCESS Be systematic and look at your results as you collect them. Everyone should record their own results, it helps you to remain focussed and is a skill you need to develop. Look for reliable, similar results. Be prepared to discard results that do not fit the pattern. QUESTIONS FOR CHECKING PROGRESS Are the results following the expected pattern? Have I collected a full set of results? Are the results the same each time we repeat the practical? Identify anomalies. Will you accept, repeat or discard them?

Activity! Work in pairs to test oils for unsaturation. Produce a table for your results before you collect any equipment. Be responsible for collecting your own results. Produce an account of the activity and a written explanation of how the test works on unsaturated but not saturated hydrocarbons.

Things to think about…. Is there a link between the state (solid or liquid) of the fats and oils and whether they are saturated or unsaturated? Some unsaturated fats are more unsaturated than others. How could you test the unsaturated fats to put them in order of how unsaturated they are?

Plenary Kerboodle examination style question 1.

Objectives to describe the ways in which oils can be extracted from plants. to explain why vegetable oils are important. to describe the test for unsaturated oils and what to look for.