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Yeast Investigation (ABSENT)

Posljednje ažuriranje about 2 years ago

6

To study how temperature affects decomposition rate, we conducted an experiment with yeast. Yeast was placed into different temperature of water (cold and warm), the amount of sugar the yeast broke down was recorded. We measured the amount of sugar broken down by looking at the amount of foam that was produced.

1

1

1

Pitanje 1

1.

How much yeast is placed into each container?

1 tbs

1/2 tbs

1/4 tbs

none

Pitanje 2

2.

How much sugar is placed into each container?

1 tbs

1/2 tbs

1/4 tbs

none

Pitanje 3

3.

How many of the beakers contained warm water?

zero

1

2

3

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Pitanje 4

4.

The independent variable is the variable that is changed. Look at contents of each beaker. What is the independent variable?

amount of water

temperature of water (cold or warm)

amount of yeast

amount of sugar

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Pitanje 5

5.

The amount of foam produced is measured. According to the picture, what beakers produced the most foam?

beaker 1

beaker 2 and 3

beaker 1 and 3

1

Pitanje 6

6.

What conclusion can be made about temperature and decomposition?

decomposition occurs faster at colder temperatures because the yeast in cold water made a lot of foam

decomposition occurs faster at warmer temperatures because the yeast in warm water made a lot of foam

decomoposition is not affected by temperature becuase the yeast placed in warm and cold water made the same amount of foam