Yeast (science)

Yeast definition 
Yeast it all around us, yeast are fungi, it is made of egg shaped cells that you can only see through a microscope. Yeast is a levening agent and is most commonly used in bread products. The earliest yeast specimen found today was from 3100bc in achient egypt. Yeast needs to be waken up from its hibernative state to be used and it needs sugar and warm water to begin working. Yeast is also used in making alcoholic beverages.
Aim: To look at how yeast us used in foods.

Equipment

• Spoon

• Kettle

• Bowl

• Beaker

• Cloth sleve

• Funnel

• Plastic

Materials
Bug (for a group of 3)

• 50ml warm water

• 1/2 tsp active dried yeast

• 1/2 tsp suger

• 1/2ground ginger

Gingerbeer (for 1 liter)

• 3/4 cups of sugar

• 1/2 tsp cream of tartar

• 1L cold water

• juice of 1/2 lemon

• 1 tsp ginger beer bug

Method

1. In a large bowl put the sugar and cream of tartar then ad the warm water
2. stir to dissolve the sugar before adding the cold water
3. add the ginger beer bug to the large bag of cold water
4. stir well then pour into your clean bottle
5. label your bottle with your group names
6. place all the bubbles in your class container
7. store in a cool dark place for a week before drinking
8. make sure you open the bottle in a kitchen sink as it might overflow. Open the cap bit by bit to allow the ear to escape

• The ginger beer must be drunk over the 6 days
• you must provide your own botttle