Energy Study Guide
Draw and explain how energy changes back and forth between Kinetic and Potential energy when you jump on a trampoline.
-As you go up and down, you have kinetic energy -As you are on the trampoline, you have potential
Name 3 ways by which heat is transferred and give 3 examples of each
1) conduction: heating a hotdog over a fire, touching a stove and being burned, ice cooling your hand 2) convection: refrigerator; hot air rising, cooling, and falling; radiator (emits warm air and takes in cool air) 3) radiation: heat from sun light entering the atmosphere, heat from a lightbulb, heat from a fire
Energy
Causes change in everything
Battery → energy moving through wires → toy car moves
Chemical → electrical → mechanical
Food → walking
Chemical → mechanical
Sun → what the sun gives off (2 forms) → energy stored in plants/fruits/ vegetables → (we eat and we...) run + reason for sweating
Chemical → nuclear & light → chemical → mechanical & thermal
If you (a person) need more energy, what can you do?
Eat food/sleep
Draw and describe what you would need to do to increase the gravitational potential energy of an object.
Raise surface
Energy Type: Kinetic
Definition: energy of movement Ex: ball falling
Energy Form: Mechanical
Definition: energy which deals with the motion of physical objects (both large or small) Ex: desk fan
Energy Form: Nuclear
Definition: holding the nucleus of an atom together Ex: nuclear bomb
Radiation
Definition: light waves through space or gas Ex: sunshine
Energy Form: Heat
Definition: measurement of total movement of particles Ex: fire
Energy Form: Electric
Definition: movement in electric charges in flow Ex: lightening
Conduction
Definition: movement through direct contact Ex: metal rod over fire
Sound
Definition: oscillations or vibrations of molecules due to compressional disturbances Ex: guitar
Energy Type: Potential
Definition: stored energy Ex: bow and arrow
Energy Form: Light
Definition: wave motion of a moving changed particle in that disturbs the electro field, the result is the light we see Ex: light bulb
Why do food items below a freezer stay cool in a fridge? Explain.
Convection because the cool air is transferred through wall of the freezer. The cool air flows down.
Why is the beach at the ocean windy?
Convection: the cool air is pushed to shore and goes back to the sea
Convection
Definition: circular motion of heated fluid material Ex: water boiling
Energy Form: Chemical
Definition: energy holding atoms to other atoms Ex: plants
What is "lost" in every energy change?
Heat
A swinging pendulum
Kinetic
A roller coaster sitting at the top of the hill is an example of which type of energy?
Potential
A roller coaster you pour into your car
Potential
Batteries
Potential
Electricity flowing through a wire
Potential
The food humans eat
Potential
The gasoline you pour into your car
Potential
When you stretch a rubber band, which type of energy are you giving it?
Potential
