Science - Decomposition

Decomposition:

Aim: To learn about the rate that different materials decompose. 
                           
Hypothesis: I think that the banana would break down first, then the bread and the paper, then the styrofoam. 

MATERIALS:

1. Paper
2. Banana
3. Bread
4. Styrofoam
5. Test tube x4
6. Test tube rack
7. Water

STEPS:

1. Put the test tube in the test tube rack.
2. Put the Styrofoam in one of the test tube.
3. Put the paper in one of the test tube.
4. Put the bread in one of the test tube.
5. Put the banana in one of the test tube.
6. Put water in all of the test tubes.
7. Then leave it. 

           

Findings:

TODAY	Colour	Change	Observations
Banana	yellow/brown	nothing	banana is half of the Tube
Paper	brown	nothing	taking up most of the Tube
Styrofoam cup	white	nothing	taking up half of the Tube
Bread	beige	nothing	taking up most of the Tube

•  The banana is half of the Tube 
•  The Paper is taking up most of the Tube
•  The Styrofoam is taking up most of the Tube 
•  The bread is taking up most of the Tube 

3 weeks	Colour	Change	Observations
Banana	black brown cream	rotten	bottom of the tube
Paper	brown	nothing	bottom of the tube
Styrofoam cup	white	nothing	halfway of the tube
Bread	black white green	rotten	halfway of the tube

•  The banana is half of the Tube 
•  The Paper is taking up most of the Tube
•  The Styrofoam is taking up most of the Tube 
•  The bread is taking up most of the Tube 

5 weeks	Colour	Change	Observations
Banana	black brown cream	rotten	bottom of the tube
Paper	brown	nothing	bottom of the tube
Styrofoam cup	white	nothing	halfway of the tube
Bread	black white green	rotten	halfway of the tube

   

•  The banana is half of the Tube 
•  The Paper is taking up most of the Tube
•  The Styrofoam is taking up most of the Tube 
•  The bread is taking up most of the Tube 

CONCLUSION:

We found out that the Banana rotted first then the Bread but the Cup and Paper did not change.
We also found out that the things that we put in the Test Tube changed colours.