Decomposing Bananas Mrs. Turner’s 4 th Grade Class.
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Decomposing Bananas Mrs. Turner’s 4 th Grade Class
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Transcript of Decomposing Bananas Mrs. Turner’s 4 th Grade Class.
Decomposing BananasMrs. Turner’s 4th Grade Class
Ask A Question
What causes food to spoil?
Does dry yeast make food spoil faster?
Write A Hypothesis
We think that the banana slice WITHOUT the dry yeast will spoil faster than the banana slice WITH dry yeast because we think that the dry yeast will protect the banana from the air.
Make A Prediction
If the banana slice has no yeast on it, then it will spoil faster because of the air exposure.
If the banana slice has yeast on it, then it will spoil slower than without because the yeast is protecting the banana from air.
Perform Experiments
1) Put a banana slice in each bag. Label one bag P for Plain.
2) Sprinkle 2/3 spoonful of dry yeast on the other banana slice. Yeast is a Decomposer so label this bag D.
3) Seal both bags. Put the bags in the same place.
4) Check both bags every day for a week. Observe and record the changes you see in each bag.
Perform ExperimentsBag Day 1 Day 2 Day 3 Day 4 Day 5
P 3.5 cmWhite/yellow
colorSmells like a
banana
D 3.5 cmCovered in dry yeast – brown
Smells like Cheerios
Day 1 - Plain Day 1 - Decomposer
Perform ExperimentsBag Day 1 Day 2 Day 3 Day 4 Day 5
P 3.5 cmWhite/yellow
colorSmells like a
banana
3 cmWhite/brown/yellow colorSmells like
rotten banana
D 3.5 cmCovered in dry yeast – brown
Smells like Cheerios
3 cmCovered in dry yeast – whiteSmelled like
rotten grapes
Day 2 - Plain Day 2 - Decomposer
Perform ExperimentsBag Day 1 Day 2 Day 3 Day 4 Day 5
P 3.5 cmWhite/yellow
colorSmells like a
banana
3.5 cmWhite/brown/yellow colorSmells like
rotten banana
3.5 cmBrown/black/
off-white colorSmells like an
old banana
D 3.5 cmCovered in dry yeast – brown
Smells like Cheerios
3.5 cmCovered in dry yeast – whiteSmelled like
rotten grapes
3.5 cmCovered in dry yeast – brown
Smells like Cheerios and
old milk
Day 3 - PlainDay 3 - Decomposer
Perform ExperimentsBag Day 1 Day 2 Day 3 Day 4 Day 5
P 3.5 cmWhite/yellow
colorSmells like a
banana
3.5 cmWhite/brown/yellow colorSmells like
rotten banana
3.5 cmBrown/black/
off-white colorSmells like an
old banana
3.5 cmBrown/black/off-
white colorSmells like an
old banana
D 3.5 cmCovered in dry yeast – brown
Smells like Cheerios
3.5 cmCovered in dry yeast – whiteSmelled like
rotten grapes
3.5 cmCovered in dry yeast – brown
Smells like Cheerios and
old milk
3.5 cmCovered in dry
yeast – tanMushy
Smells like fresh bread
Day 4 - PlainDay 4 - Decomposer
Perform Experiments
Bag Day 1 Day 2 Day 3 Day 4 Day 5
P 3.5 cmWhite/yellow color
Smells like a banana
3.5 cmWhite/brown/yellow color
Smells like rotten banana
3.5 cmBrown/black/
off-white colorSmells like an old
banana
3.5 cmBrown/black/off-
white colorSmells like an old
banana
3.5 cmBrown/black/off-
white colorSmells like an old
banana
D 3.5 cmCovered in dry yeast – brown
Smells like Cheerios
3.5 cmCovered in dry yeast – whiteSmelled like
rotten grapes
3.5 cmCovered in dry yeast – brown
Smells like Cheerios and old
milk
3.5 cmCovered in dry
yeast – tanMushy
Smells like fresh bread
3.5 cmCovered in dry
yeast – tanMushy
Smells like fresh bread
Banana is disappearing
Day 5 - Plain Day 5 - Decomposer
State Your Conclusion
o It turns out that our hypothesis was incorrect. The banana slice with the yeast spoiled faster. The yeast ate the banana slice. Yeast is a decomposer which means that it eats the remains of producers/consumers. A banana is a producer.
