Kinetic vs Potential
A stretched rubber band has what kind of energy?
Elastic Potential Energy
Energy in a flashlight comes from what source?
Chemical energy in the battery.
Name one renewable energy source.
Solar, Wind, Geothermal, Biomass, Hydro, Nuclear
True or False: Energy can be created.
False — it only transfers or converts.
A phone with 0% battery: does it have energy for music?
No, it needs energy transferred in (charging).
A rolling ball has what kind of energy?
Kinetic energy
Complete the path: Solar Panel → ______ → Flashlight.
Battery (storage) → Electrical → Light/Heat
True or False: Fossil fuels are renewable.
False
If a phone runs out of battery, did the energy disappear?
No — it was converted into sound, light, and heat.
When a match is struck, chemical energy becomes what two forms?
Heat and light.
True or False. A battery stores kinetic energy.
False. A battery stores chemical potential energy.
What is the transfer path in a hand-crank flashlight?
Mechanical (crank) → Electrical → Light.
One advantage of solar energy is ____________.
It’s renewable / doesn’t pollute / works during the day.
When kinetic energy increases, what happens to another form of energy?
It decreases (energy transferred from somewhere else).
Mila’s phone stopped playing music. Did the total amount of energy in the system decrease? Why or why not?
No — energy changed form into heat, sound, and light.
Which has more gravitational potential energy: a book on the floor or a book on a high shelf? Why?
High shelf, because it has more height (mass × gravity × height).
What energy transformation happens in a wind turbine?
Kinetic (wind) → Mechanical (blades) → Electrical.
One disadvantage of nuclear energy is ____________.
Produces radioactive waste / expensive / risk of accidents.
Why does a roller coaster never go higher than the first hill?
Some energy is always lost as heat and sound, total energy conserved.
A hydroelectric dam converts energy from water into what?
Kinetic (water) → Mechanical (turbine) → Electrical.
Name 2 types of potential energy and give an example of each.
Elastic (stretched rubber band), Chemical (battery, food), Gravitational (ball on shelf), Nuclear (uranium)...
What kind of energy is in this system: Food → Person running → Person using hand crank→ Energy in the battery → Phone charged
Chemical (food) → Mechanical (motion) → Electrical (crank) → Stored in battery → Electrical to phone.
Which energy source depends on plants and waste materials?
Biomass
Explain why a ball eventually stops rolling, even though energy is conserved.
Energy is transferred to friction → heat and sound.
Which energy source would be best for the rescue team and why?
Open-ended — students must argue from evidence.