Temperature
Energy Transfer
Equilibrium
Teacher Trivia
Thermal Energy
100
In which sample are the molecules moving faster?
Sample B.
(The temperature is higher, which means the molecules are moving faster.)
100
Energy transfers from...
A) Hot to cold
B) Cold to Hot
C) It doesn't.
A) Hot to cold
100
Is this system at equilibrium?
Yes
100
What unit will Mr. Maloney teach in two weeks?
Weather, Atmosphere, & Climate
100
A small pizza and a large pizza are put in the freezer which is at 5 degrees Fahrenheit.
Which pizza will reach equilibrium with the freezer first?
The small pizza
200
In order to transfer energy, what do molecules need to do?
Collide
200
When an object increases in temperature...
a) cold energy leaves the object
b) energy is transferred to the molecules of the object
c) energy is transferred away from the object
b) energy is transferred to the molecules of the object
200
These two cubes are the SAME size. How much energy will each cube have when they reach equilibrium?
10
200
What robotics device does Mr. Maloney like to fly in the air to take pictures?
Drone
200
The total thermal energy of this system (Sample A + Sample B) is 157.5 kJ.
When the samples are brought together, will the thermal energy of the system change?
No!
Kinetic energy transfers between molecules, but the thermal energy of the whole system (Sample A + Sample B) will stay the same. It is just redistributed between the samples!
300
Mr. Maloney states "Temperature and Thermal Energy are the EXACT same because they both are determined by the amount of Kinetic Energy an object has."
Why is Mr. Maloney incorrect?
Temperature is the AVERAGE kinetic energy of the molecules in a sample.
Thermal Energy is the TOTAL kinetic energy of the molecules in a sample.
300
Lava is hot liquid rock. When lava flows over solid ground, the solid ground beneath it increases in temperature. What happens to the molecules in the solid ground when the temperature is increasing?
a) the heat molecules combine with molecules in the ground
b) cold energy of the ground decreased
c) the energy of the molecules in the ground decrease
d) the energy of the molecules of the ground increase
D: The energy of the molecules in the ground increases.
300
The numbers inside the circles represent how much energy the molecule has. Is this system at equilibrium?
No
300
Three years ago, a different teacher taught Math next door. (In Dr. Chang's room).
This person is no longer a teacher at McClure, but you all know her.
Who is she?
Mrs. Jennings!
300
After the samples make contact and reach equilibrium, which system will have a higher temperature?
System A
System B
System B
400
When these samples are brought together, how will energy transfer? A to B or B to A?
A to B
Sample A has a higher temperature. Kinetic Energy will always transfer from the hotter sample to the colder sample, until they are at equilibrium.
400
When these two books reach equilibrium ABOUT how much energy will each molecule likely have?
a) 4
b) 5
c) 6
a) 4
Because the top book is cooler and larger, the equilibrium temperature won't be exactly in the middle. It will be slightly cooler than the middle.
400
How many years has Ms. Goodell been a teacher? (Including this year.)
11
400
A gallon of milk is in the fridge at 275 degrees Kelvin.
A half gallon of apple juice is at room temperature, 295 degrees Kelvin.
Which drink container has a higher thermal energy?
The gallon of milk
500
Below is an image from the Thermal Energy SIM. At what point do you think the person running the simulation made Samples A and Sample B collide?
A) Between 0 and 5 seconds
B) Between 15 and 20 seconds
C) Between 25 and 30 seconds
D) Between 35 and 40 seconds
B) Between 15 and 20 seconds
500
Which of these systems, if the samples were brought together, is ALREADY at equilibrium?
A: 
B: 
C: 
A
When the temperatures are equal, they are at equilibrium. If the molecules are all moving the same speed, they will not transfer energy when they collide.
500
What animal is on Mr. Maloney's socks today?
Dog / Dalmatian
500
Peter Pencil says: "When two objects touch, their molecules collide and transfer temperature until stable, a state known as equality."
Change two words to make this sentence more accurate.
1) Kinetic energy is transferred, not temperature
2) Equilibrium, not equality
"...their molecules collide and transfer kinetic energy until stable, a state known as equilibrium."