6.1 Extracting Plant Oils Flashcards
Name 2 ways oils can be extracted from plants
- crushing the plant material followed by removing water and other impurities
- distill the plant material mixed with water, this produces a mixture of oil and water from which the oil can be separated
What happens when we eat vegetable oils?
They provide us with lots of energy and important nutrients
What happens when vegetable oils burn in air?
They release a lot of energy
What are biofuels made of?
Vegetable oils
Why are biofuels good fuels?
Because the vegetable oils release a lot of energy when they burn
Why are vegetable oils important foods?
They provide us with a lot of energy and important nutrients
What chains make up the molecules in vegetable oils?
Hydrocarbon chains
What is it called if there are several double bonds in each molecule?
Polyunsaturated oils
What is the positive test for unsaturated oils?
They will turn from orange to colourless in bromine water
Why are some vegetable oils described as unsaturated?
They have double bonds between carbon atoms
How can plants concert glucose into oils?
Photosynthesis
What type of source is biofuels?
Renewable source
Name 3 types of saturated oils
- sunflower oil
- maize oil
- olive oil
Name 2 types of unsaturated oils
- butter
* lard
Name 3 things that are rich in vegetable oils
- seeds
- nuts
- fruits
