Mrs Turners 4 th 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 t ID: 170812
Download Presentation The PPT/PDF document "Decomposing Bananas" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
Decomposing Bananas
Mrs. Turner’s 4th Grade ClassSlide2
Ask A Question
What causes food to spoil?Does dry yeast make food spoil faster?Slide3
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.Slide4
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.Slide5
Perform Experiments
Put a banana slice in each bag. Label one bag
P
for
Plain
.
Sprinkle 2/3 spoonful of dry yeast on the other banana slice. Yeast is a
Decomposer
so label this bag
D
.
Seal both bags. Put the bags in the same place.
Check both bags every day for a week.
Observe
and
record
the changes you see in each bag.Slide6
Perform Experiments
Bag
Day 1
Day 2
Day 3
Day 4
Day 5
P
3.5
cm
White/yellow color
Smells like a banana
D
3.5 cmCovered in dry yeast – brownSmells like Cheerios
Day 1 - Plain
Day 1 - DecomposerSlide7
Perform Experiments
Bag
Day 1
Day 2
Day 3
Day 4
Day 5
P
3.5
cm
White/yellow color
Smells like a banana
3 cm
White/brown/yellow colorSmells like rotten bananaD3.5 cmCovered in dry yeast – brownSmells like Cheerios
3 cmCovered in dry yeast – whiteSmelled like rotten grapes
Day 2 - Plain
Day 2 - DecomposerSlide8
Perform Experiments
Bag
Day 1
Day 2
Day 3
Day 4
Day 5
P
3.5
cm
White/yellow color
Smells like a banana
3.5 cm
White/brown/yellow colorSmells like rotten banana3.5 cmBrown/black/off-white colorSmells like an old bananaD
3.5 cmCovered in dry yeast – brownSmells like Cheerios
3.5 cm
Covered in dry yeast – white
Smelled like rotten grapes
3.5 cm
Covered in dry yeast – brown
Smells like Cheerios and old milk
Day 3 - Plain
Day 3 - DecomposerSlide9
Perform Experiments
Bag
Day 1
Day 2
Day 3
Day 4
Day 5
P
3.5
cm
White/yellow color
Smells like a banana
3.5 cm
White/brown/yellow colorSmells like rotten banana3.5 cmBrown/black/off-white colorSmells like an old banana3.5 cmBrown/black/off-white colorSmells like an old banana
D
3.5 cm
Covered in dry yeast – brown
Smells like Cheerios
3.5 cm
Covered in dry yeast – white
Smelled like rotten grapes
3.5 cm
Covered in dry yeast – brown
Smells like
Cheerios and old milk
3.5 cm
Covered in dry yeast – tan
Mushy
Smells like fresh bread
Day 4 - Plain
Day 4 - DecomposerSlide10
Perform Experiments
Bag
Day 1
Day 2
Day 3
Day 4
Day 5
P
3.5
cm
White/yellow color
Smells like a banana
3.5 cm
White/brown/yellow colorSmells like rotten banana3.5 cmBrown/black/off-white colorSmells like an old banana3.5 cmBrown/black/off-white colorSmells like an old banana
3.5 cmBrown/black/off-white color
Smells like an old banana
D
3.5 cm
Covered in dry yeast – brown
Smells like Cheerios
3.5 cm
Covered in dry yeast – white
Smelled like rotten grapes
3.5 cm
Covered in dry yeast – brown
Smells like
Cheerios and old milk
3.5 cm
Covered
in dry yeast – tan
Mushy
Smells like fresh bread
3.5 cmCovered in dry yeast – tan
Mushy
Smells like fresh
bread
Banana is disappearing
Day 5 - Plain
Day 5 - DecomposerSlide11
State Your Conclusion
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.