1. Section 7.2 Energy Transformations
CHAPTER 7 ENERGY
Section 7.2 Energy Transformations

2. 7.2 Conservation of Energy
Systems change as energy flows and changes from one part of the system to another.
Each change transfers energy or transforms energy from one form to another.

3. 7.2 Energy flow How can we predict how energy will flow?
One thing we can always be sure of is that systems tend to move from higher to lower energy.

4. 7.2 Sources of energy
The chemical potential energy stored in the food you eat is converted into simple sugars that are burned as your muscles work against gravity as you climb the hill.

5. 7.2 Units of energy
Some units of energy that are more appropriate for everyday use are the kilowatt hour (kWh), food Calorie, and British thermal unit.

7. 7.3 Conservation of Energy
When you throw a ball in the air, the energy transforms from kinetic to potential and then back to kinetic.