DO NOW Define a physical and a chemical change. Give an example of each. For a change to be chemical you must produce something new that you did not have when you started.
Energy can change from one form to another ENERGY CHANGES Energy can change from one form to another
Law of Conservation of Energy Energy can not be created or destroyed. Energy is converted from one form to another
There are 7 different forms of energy:
Mechanical Energy of objects in motion (potential and kinetic) Ex: Swinging a hammer Potential energy: Stored energy Kinetic Energy: Energy in motion
Which has more potential energy? Why?
Which has more potential energy?
How can we increase Potential Energy You can increase potential energy by increasing mass or height of the object.
Chemical Energy released as an object is chemically changed Ex: Digesting food Burning wood
Heat Energy that flows from hotter objects to colder objects Ex: Heating water on a stove
Atomic Energy released from nuclear reactions splitting atoms Ex: Radioactivity
Light Energy that travels in waves producing the spectrum of colors Ex: Sun, light bulb
Electrical Energy from the flow of the electrons in atoms Ex: Any appliance that “plugs in”
Sound Energy that travels as air molecules vibrate Ex: Talking
DO NOW What are the 7 forms of energy?
“M C H A L E S” M : Mechanical C : Chemical H : Heat A : Atomic L : Light E : Electrical S : Sound
Look at the picture below and describe what type of energy is being converted from and to.