Download Acid Rain

Acid Rain
By Ryan Souza
Period 6
Mr. Leingang
Variables
Responding variable: Growth of plant
Manipulated variable: Amount of lemon juice
Controlled variable: Type of plant
Controlled variable: Amount of water
Problem
How does the volume of lemon juice
affect the growth of plants?
Hypothesis
As I increase the volume of lemon
juice then the plant with the most
lemon juice will die because acid
rain kills the cells of a plant.
Materials
•
•
•
•
Lemon Juice
3 same plants
Water
3 Spray Bottles
Procedure
1. Mix 25ml of lemon juice and water in 1 spray
bottle and label it “A”. Mix 50ml of lemon juice
and water in another spray bottle and label it “B”
2. Write down observations of plants before
beginning.
3. Water each plant.
4. Spray bottle “A” on plant”A” 5 times. Spray
bottle “B” on plant “B” 5 times. Spray water at
plant “C” 5 times.
Procedure
5. Record observations everyday for the two
weeks
6. Continue doing step 4 and 5 every day for
two weeks.
7. Safety tips- none.
Growth of plants
Day
Plant with
no lemon
juice
Plant with Plant with
25ml of
50ml of
lemon juice lemon juice
0
1
2
3
4
5
6
Green leaves
Green leaves
Green leaves
Green leaves
Green leaves
Green leaves
Green leaves
Green leaves
Green leaves
Green leaves
Green leaves
Green leaves
Green leaves
Green leaves
A yellowish leaf
Green leaves
Green leaves
A yellow leaf
Green leaves
A yellowish leaf
A brown leaf
7
Green leaves
A yellow leaf
A decaying leaf
Growth of plants
Day
Plant with no
lemon juice
Plant with 25ml
of lemon juice
Plant with 50ml of
lemon juice
8
Green leaves
2 yellow leaves
1 brown leaf w/ holes
9
Green leaves
3 yellow leaves
2 brown leaves w/ holes
10
1 yellowish leaf
3 yellow leaves
3 brown leaves w/ holes
11
1 yellow leaf
3 yellow leaves
4 brown leaves w/ holes
12
1 yellow leaf
4 yellow leaves
4 brown leaves w/ holes
13
2 yellow leaves
5 yellow leaves
5 brown leaves w/ holes
14
2 yellow leaves
5 yellow leaves
5 brown leaves w/ holes
Conclusion
•
In conclusion, I measured how the volume of lemon juice affects the
growth of plants. First, my hypothesis was as I increase the volume of
lemon juice, then the plant with the most lemon juice will die because acid
rain kills the cells of a plant. My hypothesis was correct. Second, my plant
with no lemon juice had green leaves until day 9 and had two yellow
leaves in the end. My plant with 25ml of lemon juice had green leaves
until day 5 and had five yellow leaves in the end. My plant with 50ml of
lemon juice had green leaves until day 3 and had five brown leaves with
holes. Therefore I learned the more lemon juice, the worst the condition of
the plant.