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Plant Oils

Plant Oils. Extracting vegetable oils. Finish the sentence. Plants get their energy from… Plants get their energy from the sun Plants get their energy from sugar that is made using sunlight Plants get their energy by photosynthesis: carbon dioxide + water  sugar and oxygen. Solar powered.

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Plant Oils

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  1. Plant Oils Extracting vegetable oils

  2. Finish the sentence • Plants get their energy from… • Plants get their energy from the sun • Plants get their energy from sugar that is made using sunlight • Plants get their energy by photosynthesis: carbon dioxide + water  sugar and oxygen

  3. Solar powered • Plants use energy from the sun: energy from sun 6CO2 + 6H20 C6H1206 + 6O2 • Plants turn glucose into other chemicals • Can be useful to us

  4. Vegetable oils • Rapeseed – vegetable oil • Collect seeds after plant has flowered • Crushed, pressed to extract oil • Impurities removed • Important food stuff

  5. Vegetable oils • Extraction using steam • Lavender oil - distillation • Plants boiled in water • Steam contains oil • Collected, water and impurities removed

  6. Write down the 2 ways oils can be obtained from plants • Challenge question – Why can we say that all our energy from oil actually comes from the sun?

  7. Extracting oil • Investigate the oil extracted from oranges by distillation • What does the liquid look like? • What does the liquid smell like?

  8. Oils as foods • Contain loads of energy • Hydrocarbon molecules • May be saturated or unsaturated • Tested with bromine water

  9. Why might a diet containing too much vegetable oil make you fat? • Challenge question - What is different about saturated and unsaturated oils?

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