Consider burning paper and making a pie. why would these actions be classified as chemical changes?

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

What conclusion can be made based on the temperature of soil when the light hits the soil at 0°, 45°, and 90° angles in section 2 of the experiment? did your results support your hypothesis? why or why not?

The amount of potential energy possessed by an elevated object is equal to what?