All About Energy
Work it
Transformation
Station
Station
OMG Vocabulary
100
What type of energy is stored in plants?
chemical energy
100
What has to happen in order for work to occur?
the object has to move
100
Which part of energy is part of energy is part of every energy transformation?
thermal
100
What is the law of conservation of energy
Energy can not be created or destroyed, only transformed!
200
How does heat flow?
From the hotter object to the cooler one
200
Which surface would convert the least amount of thermal energy when sliding on it and why?
tile floor, side walk, grass
tile floor, smoothest
200
What is the energy transformation when a person plays piano?
kinetic to sound
200
What is a medium? Give an example
Medium - something for sound to travel through
air, water, a wall
300
Describe the 3 types of potential energy
chemical - between bonds of atoms
elastic - stretch and compress of material
gravitational - between object and Earth
300
Give three examples of work
pushing a box
pulling a cart
typing on a keyboard
300
What is the energy transformation from a cart at the top of the rollercoaster to the cart going down the coaster?
potential to kinetic
300
Difference and similarity between sound and radiant energy
different : sound needs a medium and radiant does not
similarity : both travel in waves
400
Which state of matter does sound travel fastest through and why?
Solids because the particles are more compact so they can bounce off the particles faster.
400
What can a person do to reduce friction?
3 specific examples
lubricant - oil, grease, graphite
400
What happens to the total amount of energy during an energy transformation?
Nothing, the total amount of energy does NOT change and is always equal to 100%
400
describe the process in the sun that gives the energy to power the sun
nuclear fusion -
2 hydrogens combine to make 1 helium
500
3) KE = 100, PE = 0, ME = 100
4) KE = 50, PE = 50, ME = 100
5) KE = 0, PE = 100, ME = 100
500
A boy uses a force of 400 Newtons to throw a ball 50 meters.
A girl uses a force of 500 Newtons to throw a ball 30 meters.
WORK = FORCE X DISTANCE
Who did the most work? Show your work!
Boy = 20,000 J
Girl = 15,000 J
The boy did more work
500
List 5 examples of energy transformations
response varies
500
Define 3 ways that energy travels and give an example for each
radiation - through waves (sun)
conduction (direct touch) pot on top of a stove
convection - through movement of liquids and gases (hot air balloon)