a biology question about control groups?
Question by heehee: a biology question about control groups?
Hypothesis: temperature causes leaves to change colors.
during the summer you put one plant in a greenhouse at a typical summertime temp, and another plant in a greenhouse at typical fall temperatures.
what would be the control group?
Best answer:
Answer by dudas_91
Technically the other group covers as the control for the other.
My suggestion to you would be to choose the warmer temperature and test that separate of the colder and see what impact wormer temp has on leave color. So the warmer temp would be the experimental group and the colder would be the control. You would need to change your hypothesis to something like: How does warmer summertime temperature effect leave color compared to fall temperatures?
The so called ‘Biologist” has no idea of the parts of an experiment. Pleases disregard her answer. (FYI: The part you control is called the independent variable. If you need any help, I just took Bio Honors as a freshmen in my high school and got an “A”).
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The control is the temperature. Or, aka, what you’re able to control.
Edit: Also could be the environment (greenhouse). But the “constant” here is the leaves that are being held at a “summertime” temperature. That’s a controlled group – but I warn you, you actually need one other group to remain constant, then use the “summertime temp” and the “fall temp” as your experiements, leaving the first constant as the actual control group.
But, simply stated, I’d say the controlled, “summertime” group is the control group.
I go with the guy above me … you’ll have to tweek your hypothosis a bit ’cause there’s not really a “clear” control in this one.
Just remember – simply put – control group = what you’re controlling; the experiment = what changes about your test that’s “supposed” to affect the whole thing.
Edit 2: and to whoever gave me the thumbs down – I’m not sure why b/c I’m sure of my answer here – it’s what I do for a living. Just thought I’d throw that out there for ya HEEHEE. Good luck.
Edit 3: Dudas – I made a very valid point about how you made a valid point – “so called Biologist” ? LOL … you wouldn’t know about that would you? Freshman Honors Biology? I have a DEGREE in Biology and Chemistry dude (means I went to college and GRADUATED). I know what I’m talking about. How dare you take this poor kid’s homework and turn it into your vendetta. Chill out.
If the experiment is done in the summertime, the summer temp plants are the control group. If it’s done in the fall, the fall temp is the control group.
Basically, the control group is wherever you are not changing any variables. In summer the plant expects summer temps, so that would be a control. If it’s summertime, and your hypothesis is false, then you expect the plant to keep its leaves no matter what the temperature… if it’s fall and your hypothesis is false, both plants (or neither) lose their leaves, but the fall temp plant is the control.