Pomegranate puffs/ Marshall Middle School / MMS_S10_W12

School Level: Middle School/Jr High
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Research Information


Research Question
How will salt water affect the length of the seedling?

Research Predictions
If we put sunflower seeds in salt water and plain water then the seeds in salt water won't grow as fast as the ones in the plain water because the salt will keep the water from going into the seed.

Experimental Design
1. First we will gather all the material and put the paper towel around the inside of the beaker,
2. Then we will put 3/4 of a cup of dirt in the three different beakers with 50 ml of water.
3.Then, measure the tip of root to sprout(cm), length of germination, how many seeds germinate.
4.We will then do everything the same just put 15ml of salt in water and 5 ml in the other and keep one just with plain water.
5. Then, measure the same things and record it in our data table.


Research Conclusions
We thought if we put sunflower seeds in salt water and plain water then the seeds in salt water won't grow as fast as the ones in the plain water because the salt will keep the water from going into the seed. Our results showed that the salt was way to much for the seed to handle. We can prove this because with the beaker with salt it had the least average of all things to test. We can prove this with our lowest test results were with beaker 1 and 2. The highest average was with beaker 1 in all four tests. this supports our original hypothesis %100. therefore if we change the amount of salt and the age of seedlings we would then find new results that make let the seeds grow more.


Conversations - use this space to communicate about this project


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March 24, 2010 | 4:44 AM | Dr. Laura Cucci  (Scientist/Mentor)

Great working with you!
Sorry to hear that things did not turn out as hoped, but it was great working with you!

If you haven't written your report/conclusion yet and you have any questions, don't hesitate to ask.
March 23, 2010 | 6:21 AM | hannah12  (Team Member)

Thanks
Yes we did redo it, but we didn't know what to measure the salt with to get an even mixture. We are done with our experiment. It didn't turn out how it was supposed to. We still had fun with it. We want to thank you for talking with us and helping us fix things that weren't done right.
Thanks again!

<3 Isabella, Myra, and Hannah
March 23, 2010 | 4:08 AM | Dr. Laura Cucci  (Scientist/Mentor)

update
Hi team!

How are things going? Did you redo the experiment with a different amount of salt? You can also do a little online research to find out what the salt tolerance level is of your sunflower variety to help you out.
March 2, 2010 | 6:06 AM | bumpurr97  (Student, The Ever Evergreens - MMS_S10_W34 · -1)

Good work, people~
Looking good, guys! But where are your journals!?!?!? I was looking and it looks really good. Do you have any results yet?
March 2, 2010 | 6:01 AM | lola12  (Team Member)


We have started our experiment. The seeds have germinated and they are six days old. Tomorrow we will add the salt to 50 ml of water Yesterday we added 1 ml of water to each beaker. Our teacher said to be careful of over watering and that 7 days would be a good length for watering.

We will research how much salt sunflower seeds can handle and if 15 ml is to much we will change it to 10 ml.
March 1, 2010 | 12:37 AM | Dr. Laura Cucci  (Scientist/Mentor)

Changes
Great to meet all of you!
I like the change that you made regarding waiting to add the salt solution and using two concentrations of salt solutions. If you haven't done so already, you might want to search to see if you can find how salt tolerant the sunflower seeds that you are using are. Each specific variety will be able to withstand a certain salt concentration in the soil. That information may help you write your hypothesis as well as guide you to the salt concentrations you may want to use.

You say in your post that you will be using 15 ml and 5 ml of salt for the salt concentrations. How much salt is that in how much water?

Have you begun your exeriment yet?
February 26, 2010 | 5:55 AM | pomagranitpuff12  (Team Member)

Myra
hi im myra im in the middle. im kinda strange and random, i like being that way!
hannah is my best friend and i love her!!!
im very excited about this project
February 25, 2010 | 7:21 AM | Heather Hamilton  (Teacher)

Change is good:)
Please include a list of all of your material in your experimental design and a list of the variables you will try to control. Also from your response to your scientist I understand that you are changing your experiment so be sure to show that in your question, hypothesis and procedure. I would be happy help you learn how to make salt solutions with different concentrations just let me know what you need:)
February 25, 2010 | 6:29 AM | hannah12  (Team Member)

Isabella
I am the one to the left. I am a total dog lover I love animals and want to be a vet. I love to run!!!
February 25, 2010 | 5:56 AM | hannah12  (Team Member)

dirt
The dirt is called, "premium quality potting soil" the whole class is using it. We will not be putting fertilizer on the seeds. Also the seeds will be by the window.
February 24, 2010 | 6:16 AM | hannah12  (Team Member)

redo
We have taken consideration of both of your comments and we decided that we should restart. We will wait seven days to put the salt solution in the beakers. Instead of using plain water and salt water, we will do three beakers two of salt solution (different amounts of salt) and one with plain water. We think that one of the salt beakers will have 15 ml of salt and the other is 5 ml.

Sincerely,
The Pomegranate Puffs
February 23, 2010 | 8:35 PM | Dr. Laura Cucci  (Scientist/Mentor)

salt
Hello again!

I wanted to ask you a few questions regarding the salt that you will be adding and your goals for your experiment. It seems from your research question and predictions that you expect the sunflower seeds to germinate in salt water. Depending on the concentration (how much salt is in the water), they may not germinate at all. Have you thought about germinating your seeds all with the same water treatment and then once they reach a certain age or height then implementing your treatments? If you did that you would have seedlings to measure in both treatments.

What type of dirt will you be using? Will you be adding fertilizer at any point in your experiment? Will you be growing your seeds near a window or underneath lights?

- Laura
February 23, 2010 | 8:29 PM | Dr. Laura Cucci  (Scientist/Mentor)

Welcome
Welcome Team!
My name is Laura Cucci and I will be your Planting Science mentor this semester. I am currently an assistant professor at the Community College of Baltimore County in Maryland and I specialize in species-species interactions between plants and other symbionts. When I'm not at work I love to spend time outside hiking, mountain biking, playing field hockey, and being with my family.

I am looking forward to working with you and would love to hear a little about each of you.
:)
Laura
February 23, 2010 | 6:44 AM | Heather Hamilton  (Teacher)

Salt
How are you planning to measure the concentration of salt in the water? Have you thought about doing a weak salt solution and a strong salt solution so you can compare more than one? Your investigation is coming together very nicely:) I like the level of detail you are giving in the procedure.
February 19, 2010 | 12:50 AM | PS team

Welcome to PlantingScience!
I am happy to welcome you to this community of plant researchers. Your team has the opportunity to be mentored by a scientist to help you develop and perform your own research project. The mentor's role is to encourage and guide you through the scientific process of discovery. The more you share your ideas and research information online, the more your mentor can help.

Your scientist mentor for this project will be Dr. Laura Cucci from Community College of Baltimore County. Please introduce yourself and post some possible research topic ideas to get a conversation rolling.

These resources are available to help you get started:
Thinking Like a Scientist / Working Like a Scientist
Designing Experiments
Guide to Using A Spreadsheet

Best wishes as you start this scientific journey. We are all pleased to share this experience with you.
Have fun!

Sincerely,
The PlantingScience team
February 18, 2010 | 6:28 AM | pomagranitpuff12  (Team Member)


Hello. We are science students in washington state. Our group members are Myra, Isabella, and Hannah.
We are really excited to start our own research project.
Our research question is...
If we put sunflower seeds in salt water and plain water then the seeds in salt water won't grow as fast as the ones in the plain water.




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