The Grow-Nothing Party

Project by group mmhsharrisfall2016project

Info

Explore We know that all plants undergo cellular respiration and we want to see if temperature affects the rate of cellular respiration.
Research Question How does temperature affect cellular respiration?
Predictions Our prediction/hypothesis for the experiment is that cellular respiration will take place at a faster rate in warmer temperatures, than cooler temperatures.
Experimental Design Materials: 70 Germinating peas, 100 mL graduated cylinder, DI water, 5 vials, 5 steel washers, Absorbent cotton balls, 15% potassium hydroxide (KOH), Non-absorbent rayon, 5 graduated pipets, 5 stoppers, 2 trays (1 green, 1 black), Hot water bath, Red food coloring, Thermometer, Hot...
Conclusion After completing our experiment, we were given varied results. Our control respirometer, which was tested at room temperature (24°C), started to increase quickly and then after about 10 minutes the rate of increase started to level out. After 25 minutes of cellular respiration, our control...

Updates

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PlantingScience Staff
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Mary Lee Dudley
said

I enjoyed working with you. Have a very merry holiday!

Alexis
said

Thank you for helping us with this project! We appreciated your insight. Good luck with your baby! We hope everything goes well. 

Lindsay
uploaded image-4.png in project files
    Mary Lee Dudley
    said

    In your key it would be useful to specify what the numbers represent. What is 0.2? 0?

    Alexis
    said

    That's the key. We couldn't get it off of there.

    Mary Lee Dudley
    said

    Hmmm...maybe put a text box over it and relabel the lines with the different variables they represent

Mary Lee Dudley
said

Thank you for uploading the graphics! I look forward to hearing your analysis.

Juliabla
updated the project info
Lindsay
uploaded image-2.png and 2 more files in project files
Marin
updated the project info
Marin
said

Materials:
50 Germinating peas
100 mL graduated cylinder
Water
5 vials
5 steel washers
Absorbent cotton balls
15% potassium hydroxide (KOH)
Non-absorbent rayon 
5 graduated pipets 
5 stoppers
2 trays (1 green, 1 black)
Hot water bath
Red food coloring
Thermometer
Hot plate
Fridge

 

    Mary Lee Dudley
    said

    Peas germinate quickly, be sure they don't start rotting, which may happen after a day in water. Did you dechlorinate the water before starting?

    Marin
    said

    We let the peas germinate in DI water.

    Mary Lee Dudley
    said

    Sounds good, just be sure to include that detail in your materials list so instead of saying "water" add "distilled water"

    Mary Lee Dudley
    said

    What is the red food coloring for?

    Alexis
    said

    The red food coloring is for us to measure the oxygen in the respirometer 

Alexis
uploaded image.jpeg in project files
    Alexis
    said

    These are our materials. We also have a hot water bath

    Mary Lee Dudley
    said

    Are those pea seeds soaking in the beaker?

    Marin
    said

    Yes

Mary Lee Dudley
said

I am impressed with the careful planning you have invested so far. Keep up the great work!

Juliabla
said

We have decided that we will be using a fridge to maintain the cold temperature instead of ice.

Juliabla
said

We had originally wanted to use a perfect vacuum to experiment the effect of pressure on cellular respiration. After more planning, we realized that the supplies we needed for the experiment would not fit into the vacuum. There also wouldn't be a way for us to test our results every few minutes without opening the vacuum and changing the pressure. Then we resorted to our second experiment idea we had previously written down. The materials are easier to access and the procedure is easier to maintain. We will control the cold temperature by keeping a constant record of the water's temperature and being sure to add more ice where it is needed. We will maintain the hot temperature by keeping a constant temperature on a hot plate. We will constantly be checking the pressure for both to make sure that the temperature stays as constant as we can make it.

Mary Lee Dudley
said

Sounds great! I would love to hear why you decided to switch topics and how you intend to control the temperature during the experiment.

Marin
said

After researching the vacuum, we have decided to change our experiment to: Does the rate of cellular respiration change with temperature change?

Alexis
said

We also won't have another class until Monday.

Juliabla
said

After a little bit of thinking, here are our possible topics for research:

1. In a perfect vacuum, would cellular respiration take place more efficiently?

2. Do different temperatures affect the rate of cellular respiration?

3. Does the rate of cellular respiration differ in aquatic and land plants?

    Mary Lee Dudley
    said

    These are very interesting questions! Do you have the necessary equipment to create a perfect vacuum? If not I'd recommend researching one of the other ideas.

    Juliabla
    said

    We do have the equipment the make a perfect vacuum and we have decided to continue with that specific experiment.

Erika Valek
joined the project
Juliabla
said

Here are our thoughts for our first research topic:

1a. This investigation will further our understanding of cellular respiration because we will be able to understand the affect the varying pressure inside of the vacuum has on the plants.

b. We will create a respirometer to measure the intake of oxygen. We will put the plants in a tube and place that in the equilibrium water. Each tub of water will go in either the vacuum or in regular pressure environment. Once the experiment is finished, we will record the data that we found.

c. We will record and measure how much oxygen each respirometer took in and see which environment is most efficient for cellular respiration.

d. We will need plants, a tub of equilibrium water, a respirometer, and a thermometer for regulating temperature.

    Mary Lee Dudley
    said

    This sounds like a fun experiment! Do you have a hypothesis?

    Mary Lee Dudley
    said

    This sounds like a fun experiment! Do you have a hypothesis?

Marin
said

Hi! We're students from Mother of Mercy High School. Our names are Marin, Julia, Lindsay, and Alexis. Our group name is the grow-nothing party.  We are looking forward to working with you and exploring the wonderful world of plants!  We are interested in doing something with cellular respiration and are beginning our investigation to find a research topic today. 

    Mary Lee Dudley
    said

    Great to meet you all! I'm not able to enjoy my favorite game of rolling down hills currently since I'm due to have a baby this January. But as soon as spring comes I'll be running and jumping around again! My name is Mary Dudley and I work in Cincinnati at the Civic Garden Center. I love learning about plants and trying new techniques in school gardens. We have been enjoying some unseasonably warm weather and I've been taking time to do a lot of outdoor cooking from our fall harvest of roots and greens! What are your favorite plants to munch on?

Mary Lee Dudley
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PlantingScience Staff
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Alexis
updated the project info
Alexis
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Lindsay
updated the project info