Science - Yeast

 Hello fellow readers,

Today in Science we are playing around with yeast and trying to make it come alive. 

Yeast is alive in a hibernation state. It is a fungi. 

Aim: To look how yeast is used in food.

Equipment:  

• spoons
• kettle
• Bowl
• Beaker
• cloth sieve
• Funnel
• Plastic (PET ) Bottle cap.

Materials:

• 50 ml Warm Water.
• 1/2 tsp active dried yeast.
• 1/2 tsp sugar.

Ginger beer 9 for 1 litre ) 

• 3/4 cup sugar
• 1/2 tsp cream of tartar.
• 1 Litre cold water.
• Juice of 1/2 lemon.
• 1 tsp ginger beer bug.

Method:

1. In a large bowl, put the sugar and cream of the tartar and then add the warm water.

2. Stir to dissolve the sugar before adding in the cold water.

3. add the ginger bug into the large bowl.

4. Stir well then pour into your clean bottle.

5. Label your bottle with your groups 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 overflow. Open the cap bit by bit to allow the air to escape.

• The ginger beer must be drunk over 6 days.
• You must provide your own bottle.

We wanted to see how yeast was best activated. To do this we used 3 conical flasks, a teaspoon of yeast in each one, some warm water in each one and some sugar in one flask. Then put a balloon in each flask. We found out that the flask that had the yeast and sugar inflated the balloon. It showed that when yeast has sugar it activates and creates a gas called carbon dioxide gas.