Where do vegetable oils come from?

2. Where do vegetable oils come from?

3. Extracting Vegetable Oil

4. Farmer collects the seeds The seeds are taken to a factory where they are crushed and pressed to extract the oil • Olive oil

5. Sunflower oil

6. How do we get sunflower oil? Extracting sunflower oil from the seeds

7. Farmer collects the seeds The seeds are taken to a factory where they are crushed and pressed to extract the oil The oil is dissolved in a solvent, the solvent is removed by distillation Impurities such as water are also removed to leave pure vegetable oil. Sunflower oil

9. Distillation

10. Saturated oils tend to be solid at room temperature, and are sometimes called vegetable fats instead of oils. • This makes them suitable for making margarine, or for commercial use in the making of cakes and pastry.

11. Unsaturated oils tend to be liquid at room temperature, and are useful for frying food. They can be divided into two categories: • Monounsaturated fats have one double bond in each fatty acid • Polyunsaturated fats have many double bonds.

12. Experiment write up Scientists have to write down how they did an experiment so others can test their method and see of they can repeat their results This experiment should have these sections