Question 4
This is an extension activity.
You are going to try to find out which types of food contain starch.
You can use iodine solution to find out if a food contains starch.
Iodine solution is orange-brown. When it mixes with starch, it becomes very dark blue-black.
You will need:
• at least six different kinds of food
• some paper plates or other plates to put the pieces of food on, keeping them separate
• white tile
• bottle of iodine solution with a dropper
Method
1 Collect six different kinds of food. Try to include some foods that come from plants, and some that come from animals. Make sure you keep them completely separate from one another.
2 Draw a results table like this:
| Food | Colour of iodine solution after adding to the food | Does the food contain starch? |
|---|---|---|
| | | |
| | | |
3 Take a small piece of the first food. Put it onto a white tile.
4 Add a few drops of iodine solution. Record the colour that you see in your results table.
5 Clean the white tile. Now repeat steps 3 and 4 for the other foods, making sure to clean the tile each time.
6 Complete the last column in your results table.
You are going to try to find out which types of food contain starch.
You can use iodine solution to find out if a food contains starch.
Iodine solution is orange-brown. When it mixes with starch, it becomes very dark blue-black.
You will need:
• at least six different kinds of food
• some paper plates or other plates to put the pieces of food on, keeping them separate
• white tile
• bottle of iodine solution with a dropper
Method
1 Collect six different kinds of food. Try to include some foods that come from plants, and some that come from animals. Make sure you keep them completely separate from one another.
2 Draw a results table like this:
| Food | Colour of iodine solution after adding to the food | Does the food contain starch? |
|---|---|---|
| | | |
| | | |
3 Take a small piece of the first food. Put it onto a white tile.
4 Add a few drops of iodine solution. Record the colour that you see in your results table.
5 Clean the white tile. Now repeat steps 3 and 4 for the other foods, making sure to clean the tile each time.
6 Complete the last column in your results table.
