For example, the group that is investigating how heat affects the dead plants is also near the fan and the light. This means that their experiment isn't really figuring out if heat is affecting the dead plants, but light and wind may be, too. Just like the one in the fridge is meant to see what happens in the cold, but it's dark in the fridge, too.
We decided we should try and set up some fair tests to see if we can pinpoint what is specifically causing anything to happen to the dead plants. While our 2L pop bottles were a great idea to model the real world outside, putting holes in them to allow for air flow for our living organisms may mean that other small things like dust and microorganisms get inside. This would mean we might be introducing another possible agent for change.
Mrs. Brinza has a whole bunch of jars laying around, so we figured that they would be good containers to hold a plant part and to change just ONE possible cause. We spent today developing some fair tests...or what we thought were fair tests to answer our questions.
Here's some student work! We'll be evaluating our work on Monday to see if our investigations get the green light of approval!