Plant Oils

Today we're going to look at the Plant Oils section of Chemistry for the progress test next week (in the second half of Ms Elias' lesson on Thursday). Answer the following in your books:

1. Explain how distillation can be used to produce plant oils:
2. What other method can be used to extract oils from plants? Briefly explain the steps involved:
3. What are the differences between saturated and unsaturated oils?
4. Watch this animation. What four parts make up a molecule of sunflower oil?
5. Why are oils useful in cooking?
6. What is an emulsion?
7. Explain what 'hydrophilic' and 'hydrophobic' mean:
8. Name three foods that use emulsifiers:
9. Why do we need vegetable oils in our diet? What are some problems associated with over consumption of them?
10. The progress test next week will be on everything we have covered (in both classes) so far this year, but with more time for the material covered since christmas. Go through your books and identify one topic you're comfortable with, and one which you want to start revision on. Write these down.
11. Go to the bitesize website, and write down one thing you learn about the topic you are least confident about.