Vocabulary
What is kinetic energy?
Energy an object has because of its motion.
Heating an object to a higher temperature increases that object's.... (what type of energy)
thermal energy
Putting reflecting films on you car windows helps keep the interior cool by: absorbing, transmitting or reflecting the sunlight
reflecting the sunlight
Objects of different masses are suspended from a height. What features will have the greatest gravitational potential energy?
high mass and high height
low mass and high height
high mass and high height
When you open the door to the refrigerator for a minute, thermal energy is being transferred from where to where?
outside the refrigerator to inside the refrigerator
Define Potential Energy.
Stored energy that has not been used yet.
Which of the following is an example of chemical energy being transformed into thermal energy?
a) light switch turned on
b) a ball drops
c) a match is burned
d) an electric fire is switched on
c) a match is burned
On a summer day, asphalt is hot on your bare feet because the asphalt has (absorbed, transmitted, or reflected) thermal energy from the sun.
absorbed thermal energy from the sun
Imagine a skateboarder on a half pipe. Where does the skateboarder have the most gravitational potential energy?
Tops of the pipe
Rubbing two wooden sticks together can sometimes result in a fire. What would increase the probability of a fire starting?
rubbing the sticks together faster
Potential energy based on an object's position in a gravitational field is the definition for what vocabulary word?
Gravitational Potential Energy
Energy for the sun is transformed into (nuclear, electrical, kinetic, chemical) energy by plants.
chemical
Energy from the Sun reached the Earth through a type of energy transfer known as: absorption, conduction, convection or radiation.
radiation
The efficiency of an average gasoline powered car is about 20%. What percentage of the car's energy is not useful for powering the car?
80%
What is the law of conservation of energy?
Energy can be transformed or transferred but cannot be lost, gained or destroyed.
Ms. Erickson noticed that the hood of her car was hot after driving it for a while. What energy transformation was she noticing?
a) chemical energy to thermal energy
b) thermal energy to motion
c) temperature energy to braking energy
d) motion to thermal energy
d) motion to thermal energy
What would happen if you brought an object that was 300 degree Celsius (572F) into a room that is 22 degrees Celsius?
The thermal energy from the object would be transferred to the air in the room.
The efficiency of an average gasoline powered car is about 20%. What percentage does the car use of the energy stored in the gasoline for motion?
20%
Define thermal energy.
internal energy of a substance due to the movement of the particles within that substance.
What energy transformation takes place when a radio is plugged in and turned on?
a) kinetic to potential
b) electrical to sound
c) wire to radio waves
d) battery to motion
b) electrical to sound
One way a solar oven works is by transferring energy from the sun to...
a) thermal energy in water and food
b) electrical energy in the oven
c) chemical energy in water and food
d) light energy in the oven
a) thermal energy in water and food