|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...|
Thank you for helping us with this project! We appreciated your insight. Good luck with your baby! We hope everything goes well.
50 Germinating peas
100 mL graduated cylinder
5 steel washers
Absorbent cotton balls
15% potassium hydroxide (KOH)
5 graduated pipets
2 trays (1 green, 1 black)
Hot water bath
Red food coloring
I am impressed with the careful planning you have invested so far. Keep up the great work!
We have decided that we will be using a fridge to maintain the cold temperature instead of ice.
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.
Sounds great! I would love to hear why you decided to switch topics and how you intend to control the temperature during the experiment.
After researching the vacuum, we have decided to change our experiment to: Does the rate of cellular respiration change with temperature change?
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?
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.
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.