Energy
What unit is used to measure energy?
Joules
List the types of energy:
M___________
R___________
S___________
C___________
E___________
N___________
T___________
Mechanical
Radiant
Sound
Chemical
Electrical
Nuclear
Thermal
Temperature physically __________________ states of matter.
Temperature physically changes states of matter.
Why do the bottom of your feet burn when you walk along the pool deck? (Type of heat transfer)
Conduction
Which state of matter (not plasma) typically has particles with the most kinetic energy?
Gas
Kinetic or Potential energy? A moving car
Kinetic
What is the order of energy transformations that happen when a flashlight using a battery is turned on?
1. chemical
2. electrical
3. radiant (light) and thermal
If you boil water on a stove top for a long period of time, what will eventually happen to it?
All of the water will eventually evaporate because of the heat addition
2 objects of different temperatures touch. What happens to each one?
1. The cooler one _________________
2. The warmer one _________________
1. The cooler one warms up
2. The warmer one cools down
What does the kinetic theory of matter state about particles?
Particles are in constant motion
When potential energy goes up, kinetic energy goes _____________.
Down
If you roll a bowling ball, what are two ways its kinetic energy transformed?
Kinetic energy is transformed to thermal and sound energy
2. Which of the following is an example of heat transfer by conduction?
a. The Sun warming the Earth
b. A pot of water boiling on a stove
c. Touching a hot stove and burning your hand
d. Wind chill making you feel colder
c. Touching a hot stove and burning your hand
The desk has a lower temperature than our hands. Thermal energy is being transferred to the desk from our hands.
How does increasing temperature affect the motion of particles?
It increases motion of particles
What is the Law of Conservation of Energy?
Energy can be neither created nor destroyed
A tablet plays a music video; What is the energy transformation that occurs?
1. chemical
2. electromagnetic
3. mechanical
4. sound
Which has more thermal energy? Why?
A. An atom of gold at 15 degrees
B. A gallon bottle of Gatorade at 15 degrees
C. A quarter at 15 degrees
B because the bottle of Gatorade has the most mass
Why do you get a sunburn without the sun touching you? (Type of heat transfer)
Radiation
In which state of matter do particles have the strongest attractions to each other?
Solids
Why does a ball eventually stop bouncing?
a. The mass of the ball is too small
b. Gravity is stronger than the ball's energy
c. The ball's energy transforms to thermal and sound energy
d. Potential and kinetic energy transform to chemical energy
c. The ball's energy transforms to thermal and sound energy
What transformation occurs in each of the following?
1. Photosynthesis
2. Heating of the road
1. Solar to chemical
2. Solar to thermal
A beaker of water is at room temperature on a counter. Does this water have any energy? What type?
Yes, it has thermal energy.
thermal equilibrium
According to the kinetic theory, what happens to particle movement as temperature decreases?
Particles move slower