Difference between revisions of "Lipid"
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| style="height:20px; width:400px; text-align:center;" |This [[diagram]] shows a simple representation of a [[lipid]]. | | style="height:20px; width:400px; text-align:center;" |This [[diagram]] shows a simple representation of a [[lipid]]. | ||
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| + | ===Sources of Lipids=== | ||
| + | {| border="1" style="border-collapse:collapse" | ||
| + | |+ These foods contain a lot of [[Lipid|fats and oils]]. | ||
| + | |- | ||
| + | |[[File:Meat.png|center|125px]] | ||
| + | |[[File:CookedFish.png|center|125px]] | ||
| + | |[[File:Nuts.png|center|125px]] | ||
| + | |[[File:Butter.png|center|125px]] | ||
| + | |[[File:CookingOil.png|center|125px]] | ||
| + | |- | ||
| + | | style="height:20px; width:125px; text-align:center;" |Meat contains useful fat for our diets, but too much can lead to heart disease. | ||
| + | | style="height:20px; width:125px; text-align:center;" |Fish is a very healthy source of oils in our diet. | ||
| + | | style="height:20px; width:125px; text-align:center;" |Nuts are a healthy source of oils. | ||
| + | | style="height:20px; width:125px; text-align:center;" |Butter is full of fat and we shouldn't eat too much. Butter is found in cakes and cookies. | ||
| + | | style="height:20px; width:125px; text-align:center;" |Cooking oil is used to fry our food causing it to have a lot of oil inside it. A small amount is healthy but too much is bad for us. | ||
|} | |} | ||
Revision as of 09:47, 5 June 2019
Key Stage 3
Meaning
Lipids are molecules found in fats and oils.
About Lipids
- Oil is better for us than fat, but we need some of both.
- If we eat too much fat and oil then we can become obese.
Sources of Lipids
 |
 |
 |
 |
 |
| Meat contains useful fat for our diets, but too much can lead to heart disease. | Fish is a very healthy source of oils in our diet. | Nuts are a healthy source of oils. | Butter is full of fat and we shouldn't eat too much. Butter is found in cakes and cookies. | Cooking oil is used to fry our food causing it to have a lot of oil inside it. A small amount is healthy but too much is bad for us. |
Testing For Lipids
- Adding lipids to paper can turn the paper translucent.
The Paper Test Method
- 1. Take a small sample of food.
- 2. Wipe it on a piece of paper.
- 3. Hold the paper up to the light.
- 4. If the paper has turned translucent the food contained lipids.
 |
| There are two patches where fat has been asborbed by the paper. |
The Alcohol Emulsion Test Method
- 1. Take a small sample of food.
- 2. Place the food in ethanol and mix by shaking or stirring.
- 3. Filter the mixture.
- 4. Add the clear solution to some water.
- 5. If lipids are present then a white emulsion will appear.
 |
| The mixture on the right shows the presence of lipids. |
Key Stage 4
Meaning
Lipids are molecules, made of a glycerol head and 3 fatty acid tails, that is found in fats and oils.
About Lipids
- Lipids are an essential nutrient in our diet that is used in our nervous system.
- Lipids store chemical energy at a higher energy density than carbohydrates so the body stores extra energy in fatty tissue made of lipids.
- If there are too much lipids in our diet then we can become obese.
- Lipids are broken down by our digestive system into a glycerol head and 3 fatty acid tails.
- The fatty acids in lipids can be many different lengths.
 |
| This diagram shows a simple representation of a lipid. |
Sources of Lipids
|
|
|
|
|
| Meat contains useful fat for our diets, but too much can lead to heart disease. | Fish is a very healthy source of oils in our diet. | Nuts are a healthy source of oils. | Butter is full of fat and we shouldn't eat too much. Butter is found in cakes and cookies. | Cooking oil is used to fry our food causing it to have a lot of oil inside it. A small amount is healthy but too much is bad for us. |
Testing For Lipids
- Adding lipids to paper can turn the paper translucent.
The Paper Test Method
- 1. Take a small sample of food.
- 2. Wipe it on a piece of paper.
- 3. Hold the paper up to the light.
- 4. If the paper has turned translucent the food contained lipids.
|
| There are two patches where fat has been asborbed by the paper. |
The Alcohol Emulsion Test Method
- 1. Take a small sample of food.
- 2. Place the food in ethanol and mix by shaking or stirring.
- 3. Filter the mixture.
- 4. Add the clear solution to some water.
- 5. If lipids are present then a white emulsion will appear.
|
| The mixture on the right shows the presence of lipids. |