Yeast

 Hey bloggers

This week in Science we are learning about yeast

 1. What is yeast? 

Yeast is Fungi

Yeast has been around for thousands of years

There is natural yeast in the air that helps you make sourdough bread

There is over 1000 types kinds of yeast

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Equipment

1.Spoons 

2.Kettle

3.Bowl

4.Beaker

5.Cloth sieve

6.Funnel

7.Plastic (PET) bottle and cap

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Materials 

1. 50ml warm water

2. 1/2 tsp active dried yeast

3. 1/2 tsp sugar

 Ginger beer 

1. 3/4 cup sugar

2. 1/2 tsp cream of tartar

3. 1L cold water

4. Juice of 1/2 lemon

5. 1 tsp ginger beer bug

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Method 

1. In a large bowl, put the sugar and cream tarter, then add the warm 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 it might overflow. Open the cap bit by bit to allow the air to escape. 

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Ginger beer 

 

Yeast

What is fermentation?

the chemical breakdown of a substance by bacteria, yeasts, or other microorganisms, typically involving effervescence and the giving off of heat

What effect does sugar have on yeast?

Too little sugar in dough can slow down yeast activity

What are 3 foods that have yeast

1. Bread

2. pretzels

3. Cookies

Bye 

Next two today later

Today we made ginger beer in class. 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 te 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 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.  

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Bye