Grass Decomposition Lab
Grass Decomposition Lab
Problem: How do temperature, sunlight, amount of moisture, and presence of oxygen affect the decomposition of grass?
Controlled Variable: Amount of grass and water in each container.
Independent Variable: temperature, sunlight, amount of moisture, presence of oxygen.
Dependent Variable: decomposition rate of grass.
Hypothesis: I believe that there will be the most decomposition in high temperatures, low sunlight, low amount of moisture, and high presense of oxygen. If all these variables are true, then the grass will decompose at a higher rate.
Design: Materials:
7 plastic cups of 100 ml distilled water rubber bands sharp pin or probe freshly cut lawn plastic food wrap marker triple beam balance Method:
1.
Method:
1. Find a group of 3 people, each person a member of the village.
2. Set up your materials so that the paper (lake) is taped in the center of a desk. All cups (boats) an equal distance way from the paper. Add your fish, but you cannot have any more that 20 M&M’s (fish) in the habitat at one time. Two straws (poles) are to be stuck together with tape so that they’re connected and bent.
3. For each generation of fishing, you must suck air through the straw catching an M&M in it. Then carry it over to your cup and drop it in. You have 10 seconds to do this.
4. After each fishing season, collect your data- the number of fish you caught.
5. Before the next season you must re-populate. One fish per every two, but don’t forget your limit of 20.
6. Once you’re finished, count your total fish and record it into the database. $10 per fish, the winner is the one with the most money collected.
Data Collection:
Generation # Ali Torin Jess Total
1
1bl,1br,1gr=3
1br=1
0
4
2
1bl=1
1or, 1bl= 2
1gr=1
4
3
0
1or,1gr,1br=3
1or=1
4
4
1bl,1or=2
1gr,1br,ibl=3
1or=1
6
5
1br,1gr=2
2br,1gr=3
2gr=2
7
Ending Population: Blue: 6, Orange:
Problem: How do temperature, sunlight, amount of moisture, and presence of oxygen affect the decomposition of grass?
Controlled Variable: Amount of grass and water in each container.
Independent Variable: temperature, sunlight, amount of moisture, presence of oxygen.
Dependent Variable: decomposition rate of grass.
Hypothesis: I believe that there will be the most decomposition in high temperatures, low sunlight, low amount of moisture, and high presense of oxygen. If all these variables are true, then the grass will decompose at a higher rate.
Design: Materials:
7 plastic cups of 100 ml distilled water rubber bands sharp pin or probe freshly cut lawn plastic food wrap marker triple beam balance Method:
1.
Method:
1. Find a group of 3 people, each person a member of the village.
2. Set up your materials so that the paper (lake) is taped in the center of a desk. All cups (boats) an equal distance way from the paper. Add your fish, but you cannot have any more that 20 M&M’s (fish) in the habitat at one time. Two straws (poles) are to be stuck together with tape so that they’re connected and bent.
3. For each generation of fishing, you must suck air through the straw catching an M&M in it. Then carry it over to your cup and drop it in. You have 10 seconds to do this.
4. After each fishing season, collect your data- the number of fish you caught.
5. Before the next season you must re-populate. One fish per every two, but don’t forget your limit of 20.
6. Once you’re finished, count your total fish and record it into the database. $10 per fish, the winner is the one with the most money collected.
Data Collection:
Generation # Ali Torin Jess Total
1
1bl,1br,1gr=3
1br=1
0
4
2
1bl=1
1or, 1bl= 2
1gr=1
4
3
0
1or,1gr,1br=3
1or=1
4
4
1bl,1or=2
1gr,1br,ibl=3
1or=1
6
5
1br,1gr=2
2br,1gr=3
2gr=2
7
Ending Population: Blue: 6, Orange: