Download Energy Notes - Bismarck High School

Goals
Define Energy
2. Describe different forms of energy
3. Explain the Law of Conservation of Energy
4. Identify sources of energy loss.
1.
Vocabulary
Energy: the ability to do work
Kinetic Energy: energy of a moving
object
Potential Energy: energy stored
because of the position of an object
What is energy?
 Energy is the ability to do work.
 Work transfers energy from one object to another

EX: lifting a box transfers energy from you to the box.
 There are 2 main categories of energy.
 Potential (stored energy)
 Kinetic (moving energy)
Types of Potential Energy
 Chemical Energy
 Energy stored in bonds between atoms

Found in food, batteries, gasoline, etc.
Types of Potential Energy
 Elastic
 Energy stored in stretched/compressed objects
 Examples: stretched rubber band, compressed spring
Types of Potential Energy
 Gravitational
 Energy stored in objects that can fall
Types of Kinetic Energy
 Thermal Energy
 Energy of moving atoms
 Faster atoms = more heat
SLOW: SOLID
MEDIUM: LIQUID FAST: GAS
TURBO: PLASMA
Types of Kinetic Energy
 Motion Energy
 Found in moving objects
Types of Kinetic Energy
 Electrical Energy
 Moving streams of electrons
Types of Kinetic Energy
 Light Energy
 Waves of energy

Includes light waves, radio waves, x rays, gamma rays,
microwaves
Types of Kinetic Energy
 Sound Energy
 Waves of energy moving through atoms.
Total Energy
 Objects can have both potential and kinetic energy at
the same time.
 Ex. At the top of a rollercoaster, riders are both moving
and could also fall down.
Conservation of Energy
 Energy cannot be created or destroyed
 Universe always has the same amount of energy
 Energy can be transferred.
 Examples (choose one to write)
 In your body, chemical energy from food is changed to
motion energy as you move your hand to take notes.
 Light Energy from the sun is captured by plants and
stored in chemical energy of sugar molecules.
 Motion energy of falling water is changed into electrical
energy at the Garrison Dam.
Conservation of Energy
 Some energy is often lost as heat(thermal energy)
 Examples: *choose one to write



Car engines are warm after driving.
People warm up when working out.
Light bulbs get hot when left on.