The Type of the Water Affects the Height of Egeria Densa
By Sophie, Booker, and Annabelle 6J
Our hypothesis was the type of water affects the height of egeria densa. We had four 2 liter bottles with 1,250 milliliters of different types of water in each bottle, along with a 6 cm egeria densa plant and 1 cup of fish gravel. Our different types of water were salt water, tap water, Poland Spring, and Seltzer. Every week we measured the height of the Egeria Densa to see if it had grown.
Our materials were:
- four 2 liter bottles-empty and clean
- 1 liter (4 cups) of Petco fish gravel
- 1 liter (5 cups) of Poland Spring
- 1,250 milliliters of tap water
- 1 liter bottle of seltzer
- 4 Egeria Densas
- 50 milliliters of salt
- Ruler
- Measuring cups
- Scissors
- Spoon
Our procedure was:
- Cut off the tops of clean bottles at 21 cm.
- Pour .2 liters (1 cup) of gravel into each bottle.
- Pour in 1,250 milliliters of tap water into 1 bottle.
- Pour in 1,250 milliliters of seltzer into 1 bottle.
- Mix 50 milliliters of salt with 1,250 of tap water in 1 bottle. Stir with a spoon.
- Pour 1,250 mL of Poland Spring into 1 bottle.
- Cut the Egeria Densa at 6 cm.
- Plant Egeria Densa in the gravel 2 cm under.
- Measure each Egeria Densa every tuesday by pulling the plant out of the water and putting it up against a ruler.
Results
The Height of Egeria Densa is Changed When the Type of Water is Manipulated
|
The Type of Water
|
Height of Egeria Densa
|
Average Height of Egeria Densa
|
Annabelle
|
Sophie
|
Booker
|
Seltzer
|
8 1/2 centimeters
|
8 centimeters
|
9.3 centimeters
|
8.3 centimeters
|
Poland Spring
|
8 centimeters
|
14 centimeters
|
10.16 centimeters
|
10.72 centimeters
|
Tap
|
8 centimeters
|
10 centimeters
|
9.3 centimeters
|
9.1 centimeters
|
Salt
|
8 centimeters
|
9 centimeters
|
8.5 centimeters
|
8.5 centimeters |
Lessons Learned
- We learned that the type of water that works to increase the height of Egeria Densa is Poland Spring.
- We also learned that not only does Poland Spring water helps increase the height of an Egeria Densa, that it makes it greener and sprout more branches.
- We learned that seltzer water decreases the plants hieght probally becuase of the carbonation.
- We learned that our groupmembers did not perform the experiment the same way because we all started the experiment with a different height of egeria densa (Annabelle at 6 cm and Sophie and Booker at 10 cm).
- Also the way Sophie measured the plant (by taking it out of the water) could affect the growth of the plant.
- In addition, the plastic of the bottle may have affected the growth.
- We all held the experiments at different houses with different climate, sunlight, air temperature, etc.
Check out our other pages!!!!
The Volume of the Container Affects the Height of Egeria Densa - Annabelle, Booker, Sophie '08-'09
The Type of Water Affects the Height of Egeria Densa-Sophie, Annabelle, and Booker-'08-'09
The Volume of Container Affects Height of Blanket Flower-Annabelle, Booker, Sophie '08-'09
Comments (22)
sophie20156j said
at 7:02 am on Apr 3, 2009
Lets finish page soon- by monday- guys!!!!!!!!!!
Sophie
annabelle20156j said
at 6:37 pm on Apr 3, 2009
mr. wilson changed the due date to friday!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1
sophie20156j said
at 3:32 pm on Apr 7, 2009
guys if you could remember how much water we put in each bottle that would be great! thanks!
booker20156j said
at 4:29 pm on Apr 8, 2009
sorry i couldn't get on
sophie20156j said
at 6:22 pm on Apr 8, 2009
Its all right. I understand.
sophie20156j said
at 6:25 pm on Apr 8, 2009
Annabelle,
Was this the page you did all the work on because it does not show up on my computer too!?
sophie20156j said
at 7:32 pm on Apr 8, 2009
If you guys could post your results on the comments here and on our other page please! It would make it a lot easier to make our results section. Thanks so much!!!
annabelle20156j said
at 8:57 pm on Apr 8, 2009
sophie it was the other page!
annabelle20156j said
at 9:20 pm on Apr 8, 2009
guys,
could you please fill in the table with your results?
annabelle20156j said
at 9:27 pm on Apr 8, 2009
sophie,
i measured my plant differently! i just stuck the ruler straight in the water against the plant!
sophie20156j said
at 6:29 am on Apr 9, 2009
Oh well maybe we could just say that in our lessons learned OR if your plant was really planted 2 cm in the gravel (mine wasn't) then you could just add 2 cm.
annabelle20156j said
at 3:38 pm on Apr 9, 2009
sophie,
thanks for adding your data now we just need booker's
sophie20156j said
at 5:49 pm on Apr 9, 2009
Mr. Wilson my pictures will not show up! Can you please help me? Thank you very much!!
annabelle20156j said
at 9:37 pm on Apr 9, 2009
sophie,
i can put my pictures in
chuma20156h said
at 2:44 pm on Apr 16, 2009
What is a Egeria densa?
booker20156j said
at 4:13 pm on Apr 17, 2009
Egeria Densa is a kind of water plant that looks a lot like Elodia
shiraz20156h said
at 6:21 pm on Apr 17, 2009
Very good page. I liked the photos. There wasn't anything wrong with it except that the data table was a little too big.
chuma20156h said
at 5:04 pm on Apr 23, 2009
Yes. Very good. I agree with Shiraz though. Your data table is REALLY big. Overall: GREAT JOB!!!
sophie20156j said
at 8:27 pm on Apr 28, 2009
Guys,
I thought the plant was cut at 10 cm! What did u cut it at????!! If we cut it with different height we will have to change our poster!!!!!!!!!!!!!!!!
annabelle20156j said
at 8:59 pm on Apr 28, 2009
i cut it at 6 cm! i thought we told booker to write that in our conclusion????????????????????? i am pretty sure we metioned it someplace!!!!!!!
felix20156h said
at 10:05 pm on Apr 29, 2009
Ill start with cold feedback...
In the conclusion you didn't add that impurities coming of the plastic could affect the plant's growth.
Also couldn't taking the plant out of the water affect the growth?
reader said
at 3:20 pm on May 2, 2009
You guys did a great job
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