Energy Transformations
A television converts electrical energy into _________________ and ______________ energies.
Light energy and sound energy
What is the law that states that energy cannot be created or destroyed only transformed from one energy to another?
Law of Conservation of Energy
Lightning during a thunderstorm is an example of what form of energy?
Electrical Energy
Shooting an arrow from a bow converts ______________ into kinetic energy.
Potential
What heat transfer happens when you burn your hand by touching a fire?
Conduction
What is the energy transformation?
sun ----> apple tree
(think about what the plant needs for photosynthesis)
Solar energy to chemical energy
Plugging a microwave into an outlet is an example of what type of energy.
Electrical Energy
A bicycle and a fan have what type of energy in common?
A heavy vase on a table has this type of energy.
Potential Energy
What kind of heat transfer happens when the sun is heating your body?
Radiation
A hungry football player eating a large sandwich to use the food for energy.
Chemical energy to mechanical energy
Which of the following is NOT mechanical energy?
A. Pedaling a bike
B. Rowing a boat
C. Running up a hill
D. Turning on a light bulb
D. Turning on a light bulb
Energy that has the ability to fall; this type of energy increases the higher up you go.
Gravitational Energy
A person running down the sidewalk has this type of energy.
Kinetic Energy
When you start your car, chemical energy (gas) turns into _____ energy
Mechanical Energy
A solar panel on the roof of a building used to heat and cool the building.
Light energy to electrical energy
A hot potato is sitting out on the counter. After 3 hours, you pick up the potato and notice that it is no longer hot. Why is the potato not hot anymore?
a. the cold room made the potato cold
b. the potato is molded, and mold makes food cold
c. the heat from the potato went to the air
d. the potato is still hot
c. the heat from the potato went to the air
Substances which absorb _________ energy get hotter (i.e. molecules in the material vibrate or move faster: the molecules gain kinetic energy)
Heat/Thermal Energy
A person that has just jumped from an airplane has this type of energy.
Potential and Kinetic Energy
Warm air rises and the cool air sinks demonstrates this type of heat transfer.
Convection
A battery charger converts _________________ energy into _________________ energy.
Electrical energy into chemical energy
Which of the following scenarios represents thermal energy transfer through radiation?
a. A thermometer sitting on top of a heat lamp.
b. A person trying to unscrew a hot light bulb.
c. A child sitting in front of a space heater.
d. Swimming in the pool, and noticing that the deeper end of the pool is colder than the shallow end.
c. A child sitting in front of a space heater.
What type of energy does an oven produce?
Light energy and heat/thermal energy
Two factors that affect an object's kinetic energy
Mass and Speed
Conduction occurs in...
Solids