This is for a 4th grd science project. I am in doubt in what independent variables to use for the project.
The topic that my daughter selected is Does heart rate INCREASE with INCREASING SOUND volume?
Thank you for your help!!!
science - SraJMcGin, Thursday, October 6, 2011 at 3:42pm
You might glance through some of the following links to see if anything will help:
science - Anonymous, Friday, November 13, 2015 at 8:50pm
I need help