Kinetic Energy
Potential Energy
Forms of Energy
Energy Transformations
Energy Transformations w/ CER
Thermal Energy
100
What is the equation to calculate KE?
KE = 1/2 x m x v2
100
What is the equation to calculate PE?
PE = m x g x h
100
Form of energy stored in food, charcoal and batteries
Chemical Energy
100
According to the law of conservation of energy, energy cannot be created or destroyed it can only be ____________.
transformed
100
What are the three parts to writing a CER argument?
Claim, Evidence, Reasoning
100
What is the difference between a conductor and insulator
Conductors: let heat flow easily
Insulators: Block heat
200
The KE of an object increases as its _____ increases.
a. height
b. velocity
c. gravity
b. velocity
200
Which point has the most PE?
W
200
Form of energy that depends on an object's height
Gravitational potential energy
200
What energy transformation do all three items have in common? (2 answers)
Electrical --> Thermal
200
Josh plugs in his headphones to charge. After his it's done, he turns it on and then plays music. What type of energy transformation is happening?
Write a CLAIM for this energy transformation. (complete sentence!!)
When Josh charges his airpods and uses it, it transforms electrical energy into electromagnetic and sound energy.
200
Thermal energy moves from _____ to ______ items.
a. warmer to cooler
b. cooler to warmer
c. warmer to warmer
d. cooler to cooler
a. warmer to cooler
300
Barry Bonds swings a bat which has a mass of 1.5 Kg at a velocity of 55 m/s. Calculate his KE.
Don't forget your units!
KE = 1/2 x m x v2
= 1/2 x 1.5 x 552
= 2268.75 J
300
A toy roller coaster is at the top of a 2 m hill and has a mass of 9.6 grams. Calculate its PE.
Don't forget your units.
PE = m x g x h
= 9.6 x 9.8 x 2
= 188.16 J
300
List two types of energy is present when you bounce a ball?
mechanical, elastic, sound, gravitational
300
You put gas in your car then drive off. What is the energy transformation?
Chemical --> Mechanical/Thermal
300
Josh's bluetooth airpods died while listening to music. He plugs them in and waits for them to finish charging. After his headphones are finished charging he turns them on and then plays music.
List 3 pieces of evidence from the text to support electrical, sound and electromagnetic energy.
- Plugs it in
- plays music
- bluetooth airpods
300
Ocean currents are caused by differences in temperature of the air which create density and pressure changes that move water around the globe. What type of heat transfer is this?
convection
400
A golf pro swings his driver which weighs 0.75 kg at a velocity of 60 m/s. Calculate the kinetic energy of the club.
KE = 1/2 x m x v2
= 1/2 x 0.75 x 602
= 1350 J
400
Calculate the PE of a 50 kg diver on the top of a 100 ft diving board.
PE = m x g x h
= 50 x 9.8 x 100
= 49,000 J
400
You eat a slice of pizza, go for a run and sweat it off,
What are the three forms of energy involved?
Chemical, mechanical, thermal
400
Lighting up a firework
Chemical ---> mechanical/sound/light/thermal
400
I plug in the rice pot to cook rice. After a few minutes, steam starts coming out of the top vents indicating the rice was cooking. What type of energy transformation happens when I cook rice?
Write the CLAIM for this energy transformation. (complete sentences!!!)
When I use the rice pot at home, it converts electrical energy into thermal energy.
400
List one example of radiation WITH AN EXPLANATION.
Anything with feeling heat without direct contact.
500
A 2 kg ball is sitting at the top of a 10m hill. Then it gets pushed at rolls at a velocity of 7m/s. Calculate its KE AND PE.
PE = 2 x 9.8 x 10 = 196 J
KE = 0.5 x 2 x 72 = 49 J
500
When an object is dropped, what happens to its KE and PE?
a. KE and PE increases
b. KE decreases, PE increases
c. KE increases, PE decreases
c. KE increases, PE decreases
500
List 4 forms of energy in this picture WITH A SHORT EXPLANATION.
Light- sun
thermal- sun
mechanical- paddling boat, reeling in fish, fish swimming
chemical- fish is food
sound- from ocean, boat, people talking
500
When you speak into a cell phone and your friend hears your voice, what is the energy transformation?
Sound --> Electromagnetic
500
I plug in the rice pot to cook rice. After a few minutes, steam starts coming out of the top vents indicating the rice was cooking. What type of energy transformation happens when I cook rice?
CLAIM: When I cook rice using the rice pot, it converts electrical energy into thermal energy.
List two pieces of evidence to support the claim.
- plug in rice pot
- steam coming from vents
500
List one example of convection WITH AN EXPLANATION.
anything of heat transferring through liquids or gases like boiling water, hot air balloon, retro popcorn maker