Planaria Regeneration in Different Types of Water.
By Brayden Chave (7th hr) and Kyle Tam (1st hr) Honors Biology Mr. Kerwin

Summary: We will test planaria that are cut in half to see if they regenerate in different types of water. We will test salt water, fresh water, and sugar water on the planaria. In each jar we will have 2 planaria that have been cut in half and one planaria that is not cut in half so we can compare regeneration in the planaria.

Purpose: We decided to do this activity to find out if planaria regenerate in different water types. We put planaria in 3 different types of water, we put to worms that had been cut in half and one that was fully grown and not cut.

3x background info
(Carson, Cat. "Earthworm Characteristics." Ehow. [[#|Demand Media]], 30 Sept. 2009. Web. 27 Nov. 2012.)
In this article we learned earthworms have many different organs like: a small brain, digestive system, a reproductive, a circulatory system, and 5 pairs of hearts. Also earthworms have over 150 segments and are usually several inches long.

(EwanPetrie. "Can an Earthworm Live If It Is Chopped in Two?" EHow. Demand Media, 14 Oct. 2010. Web. 27 Nov. 2012.)
In this article we learned that worms breathe through their skin. We also found out that most of the worms vital organs are in it front half of the worm.

(Sinclair, Miranda. "What Type of Environment Do Earthworms Live In?" EHow. Demand Media, 12 May 2011. Web. 27 Nov. 2012.)
In this article we learned that earthworms prefer cool themperature like below 75 degrees. Also worms like wet cool soil, like under leaves, rocks, or dirt.

We plan on cutting planaria in half and putting them in different water types and see if the planaria regenerate again. We will do this experiment to see if planaria regenerate in different water types.

How much moisture is some, a lot, and little? J-Urban
What environments are you going to be testing them? (Mr. Kerwin)
What if the size of the worm affects the regeneration, how can you measure that? (Jfager 1/8)
3x more background info

(Flood, Stephanie. "How to Raise Earthworms in a Small Container." EHow. Demand Media, 12 Sept. 2009. Web. 20 Dec. 2012.) In this article we learned that earthworms need air to breath and different [[#|foods to eat]] in a small environment and also that if earthworms have too much water they will die.

(McGuffin, David. "What Food Do Earthworms Eat?" EHow. Demand Media, 14 Sept. 2010. Web. 20 Dec. 2012.) In this article it told us about what earthworms eat they mainly eat soil, dead grass, any foods (no meat) and even cardboard/ newspaper.

(Fischer, Fern. "What Types of Soil Do Earthworms Prefer?" EHow. Demand Media, 26 Aug. 2009. Web. 20 Dec. 2012.)
In this article we found out that they don't like clay or compacted soil they prefer loose soil with lots of nutrients and compost in it.

Hypothesis: If planaria regenerate in different types of water then we can conclude that different types of water are either good or bad for planaria.

Materials: planaria, scalpel, 9 jars to live in, spring water, sugar, salt, teaspoon.

Fix Critiques: We plan to have 3 different environments
1. fresh water
2. sugar water
3. salt water
We plan on using the the same types of water and the same amounts of salt or sugar.
We also plan on having 3 of each group.
Maybe try a environment where there is no moisture as well as the other three. Nathaniel Sheets
How long are you testing this? (crothers)
How will you tell how much moisture is in the environments you are experimenting in. (Ayers 1/10/13)

Methods:
1st we plan to gather our materials, 27 planarian worms, scapel, 9 jars, spring water, salt, sugar, and tropical fish food.
2nd we will open the jar and put the water in and fill it up half way.
3rd put one table spoon of salt into 3 jars and the same for sugar but nothing for fresh water.
4th next we put one worm in all jars.
5th next we cut 2 other worms and put them in each jar.
6th Then we will put plastic wrap over the top and put a hole in top.
7th we will feed them on the first of 20 days and thats all.


How long we estimated the planaria had regrown.












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type
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Limitations: The salt planira died, solution we determined they would not grow in it it was hard it tell if they grew, solution we picked up the jar so they would stretch out.
We could not find them, solution I asked Mr Kerwin were they were.

Analysis: We tested planaria in 3 different types of water, we found out they grew the best in sugar water. We know they grew best in there because by the end of the experiment they were slightly bigger then the spring water planaria. Our salt water planaria died afterr the first night so we concluded that salt water was too strong for the planaria.



Results: The sugar water planaria grew bigger faster then the other planaria. The salt water planaria died overnight. The spring water planaia grew at a constant rate but not as good as the sugar water.`




CONCLUSION: If we put planaria in sugar water then they will grow the best.
We thought they would grow best in spring water but they grew best in sugar water.
We think that because sugar water had more nutrients in it for the planaria.

Background Info new

(Hunter, Amy. "How to Keep Planaria Alive in the Classroom." EHow. Demand Media, 21 Feb. 2011. Web. 04 Apr. 2013.)
Planaria are flat bodied worms.
They live in freshwater creeks or streams.
They are able to regenerate lost body parts.

(Brandt, Elizabeth. "How to Cut Planaria." EHow. Demand Media, 17 May 2011. Web. 04 Apr. 2013.)
Planaria are free swimming flatworms.
They have a 3 branched digestive system, a broad ciliated body, and a mouth on their lower side.
Planaria are nonparasitic worms.

(Ubeda, Joao. "Planaria Life Cycle." EHow. Demand Media, 30 July 2009. Web. 04 Apr. 2013.)
One way planaria reproduce is by separating its body into 2 new planaria.
They are carnivores that eat decaying meat.