Describe how we can test foods for fat and protein Suggest who might need a special diet of either fat or protein and explain why Outcomes State what foods contain fat and protein Key Words Fat Protein Food Tests Write a complete sentence answering this. Think, Pair, Share! What would people be like if we ran out of carbohydrates?

Describe how we can test foods for fat and protein Suggest who might need a special diet of either fat or protein and explain why Outcomes State what foods contain fat and protein Key Words Fat Protein Food Tests Learning Objectives State what foods contain fat and protein Describe how we can test foods for fat and protein Suggest who might need a special diet of either fat or protein and explain why

Describe how we can test foods for fat and protein Suggest who might need a special diet of either fat or protein and explain why Outcomes State what foods contain fat and protein Key Words Fat Protein Food Tests Demonstration What do you think these two solutions test for? Benedicts – Iodine –

Describe how we can test foods for fat and protein Suggest who might need a special diet of either fat or protein and explain why Outcomes State what foods contain fat and protein Key Words Fat Protein Food Tests Demonstration What do you think these two solutions test for? Benedicts – Sugar (single glucose) Iodine – Starch (lots of glucose)

Describe how we can test foods for fat and protein Suggest who might need a special diet of either fat or protein and explain why Outcomes State what foods contain fat and protein Key Words Fat Protein Food Tests Task - Testing for glucose using benedicts. 1.Place the food in a boiling tube. 2.Add 4-5 drops of benedicts solution. 3.Place the test tube into a beaker of warm water, on a gauze over a bunsen burner. 4.Time for 10 minutes. 5.If there is a colour change from blue to red, sugar is present. 6.No colour change = sugar not present.

Describe how we can test foods for fat and protein Suggest who might need a special diet of either fat or protein and explain why Outcomes State what foods contain fat and protein Key Words Fat Protein Food Tests Task - Testing for starch and glucose. You will need (on your tables) – Each type of food, tile, iodine, benedicts, paper towels, pipettes, bunsen burner, beaker, tripod, gauze.

Describe how we can test foods for fat and protein Suggest who might need a special diet of either fat or protein and explain why Outcomes State what foods contain fat and protein Key Words Fat Protein Food Tests Task - Testing for starch using iodine. 1.Add the food to the tile. 2.Add 1-2 drops iodine. 3.If iodine changes from red/brown to blue/black, starch is present. 4.If it does not change colour, no starch is present.

Describe how we can test foods for fat and protein Suggest who might need a special diet of either fat or protein and explain why Outcomes State what foods contain fat and protein Key Words Fat Protein Food Tests Testing foods for protein Add biurettes solution to crushed food Purple = protein Blue = no protein

Describe how we can test foods for fat and protein Suggest who might need a special diet of either fat or protein and explain why Outcomes State what foods contain fat and protein Key Words Fat Protein Food Tests Testing food for fat. grind food with ethanol filter add water cloudy = fat Not cloudy = no fat

Describe how we can test foods for fat and protein Suggest who might need a special diet of either fat or protein and explain why Outcomes State what foods contain fat and protein Key Words Fat Protein Food Tests Copy this table into your books: Use a pencil and a ruler Food Type Observation s using Iodine Starch presen t? Observation s using Benedicts Glucos e present ?

Describe how we can test foods for fat and protein Suggest who might need a special diet of either fat or protein and explain why Outcomes State what foods contain fat and protein Key Words Fat Protein Food Tests So what is the difference between starch and glucose? Each make one part of a paper chain and label it sugar. Stick them together with others on your table. If you finish: Write a conclusion from today’s investigation. Mention which food did or did not contain glucose or starch and how you knew. Did you already know that?

Describe how we can test foods for fat and protein Suggest who might need a special diet of either fat or protein and explain why Outcomes State what foods contain fat and protein Key Words Fat Protein Food Tests Task – Complete the missing words Starch is a sugar made from many ……….. molecules joined together. We get energy ………. from glucose than we do starch because it does not have to be …………. down to be used for energy. ………. solution is used to test for sugar. This will change from ……. to ……. if sugar is present. ……… is used to test for starch. It will change from …….. to ……… if starch is present. The 7 nutrients our bodies need are: Words: glucose, red/brown, blue/black, iodine, benedicts, blue, red, faster, broken

Describe how we can test foods for fat and protein Suggest who might need a special diet of either fat or protein and explain why Outcomes State what foods contain fat and protein Key Words Fat Protein Food Tests Plenary – What’s in it! If I test a food using the following solutions and the following colour changes take place, what is in the food? Food Test 1 Iodine – red/brown Benedicts – Red Food Test 2 Iodine – red/brown Benedicts – Blue Food Test 3 Iodine – blue/black Benedicts – Red Food Test 4 Iodine – blue/black Benedicts – blue

Describe how we can test foods for fat and protein Suggest who might need a special diet of either fat or protein and explain why Outcomes State what foods contain fat and protein Key Words Fat Protein Food Tests Plenary Write your answers to these questions on a post-it. Discuss in groups. 1.What uses do you think glucose has in the body from what you have learned today. 2.What uses do you think starch has in the body from what you have learned today.