What is the independent variable, dependent variable, constant and control group?
Three redwood trees are kept at different humidity levels inside a greenhouse for 12 weeks. One tree is left outside in normal conditions. The height of the trees are measured once a week.
Please help!!!!!!!!!!!! Thank you (:
One Response
Stephanie
06 Sep 2011
The IV is the humidity levels and the DV is the height of the trees. The constant/experimental group is the humidity levels inside the greenhouse and the control group is the tree outside.