Yeast

 What is Yeast? 

Yeast are fungi , they are in the air all around us. Yeast has been around for thousands of years , Natural yeast is in the air . Its man made in a bottle . There is over 1000 kinds of yeast . 

Equipment:

• Spoons 
• Kettle
• Bowl
• Beaker
• Cloth Sleve
• Funnel
• Plastic  (PET) Bottle and Cap 

Materials 

• 50ml Warm water 
• 1/2 tsp Active dried yeast 
• 1/2 tsp sugar 
• 1/2 tsp ground ginger 
• Ginger beer ( 1 liter) 
• 3/4 cup sugar 
• 1/2 tsp cream tartar 
• 1. Cold Water 
• Juice of 1/2 lemon 
• 1tsp ginger bear bug . 

Method: 

1.  In a large bowl , put the sugar and cream of tartar , then add the water
2. Stir to dissolve the sugar before adding the cold water 
3. Add the ginger beer bug to the large bowl of cold water 
4. Stir well and then pour into your clean bottle 
5. Label your bottle with your group names 
6. Place all the bottles in the class container 
7. Store in a cool , dark place for one week  before drinking 
8. Make sure you open the bottle in the kitchen sink as it might over flow . Open the cap bit by bit to allow the air to escape  . 

What is Fermentation ? 

 The chemical breakdown of a substance by bacteria , yeasts , or other microorganisms . 

What effect does sugar have on yeast?

Too little sugar in dough can slow down yeast activity: Yeast is a lot like us – it loves to eat sugar. Yeast needs sugar to produce carbon dioxide – the leavening gas that causes the dough to rise.

What are 3 foods that have yeast?

Breads, muffins, croissants, biscuits, and other baked goods usually contain yeast.

    

Today we made Ginger Beer . We did this by activating the yeast first by adding sugar to the yeast , putting some ginger and warm water in a cup together . Once we had done this we put it to the side and left it to ferment while we made the rest of the ginger beer. We made the ginger beer in an ice-cream container by adding first the sugar , then the water , some lemon juice and lastly the ginger beer bug. Once everything was mixed up we put it in a bottle. It is going to take about 6 days to turn into ginger beer. Mr Palmer is going to keep it in his office for the next week .