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100

What are all things made up of? 

Molecules 

100
Define equilibrium.  

a balanced state in which a system is stable, such as when two or more samples are at the same temperature

100

Define temperature. 

Temperature is a measure of the average kinetic energy of the molecules of a thing. 

100

How does the temperature of the outer layer compare with the temperature of the inner layer before the layers touch? What will happen after the layers have been touching for a while?

The outer layer has more kinetic energy and a higher temperature before it touches. 

After the two layers touch each other, the two layers will have similar kinetic energy and temperatures because they will reach an equilibrium 

200

How do molecules move at a colder temperatures? 

Molecules move slow. 
200

Define energy transfer. 

To move energy from one place to another. 

200

Object A has an average kinetic energy of 30 degrees Celsius. Object B has an average kinetic energy of 10 degrees Celsius. Which object has a higher temperature? 

Object A has a higher temperature because that object has a higher average kinetic energy. 

200

After the gears have been touching for a while, which of the two bottom gears will be cooler, and why?

The larger bottom gear will be cooler than the smaller bottom gear, because the energy that transferred to it was spread out over more molecules.

300

How do molecules move in warmer temperatures? 

They move fast. 

300

Describe an object's kinetic energy when it is at colder temperatures. 

An object at colder temperatures will have low kinetic energy. 

300

Object A has four molecules with an energy level of four. What is the average kinetic energy of the object? 

Object A has the average kinetic energy of four. 

300

Lin cooked a pot of soup, then put half the soup in the freezer for a while. Now the soup in the pot is hot, and the soup in the freezer is cold. What is the difference between the molecules of the soup in the pot and the molecules of the soup in the freezer?



Responses


The molecules of the soup in the pot are moving faster than the molecules of the soup in the freezer.


400

How do you find the average ? 

Add all the addends then divide by the number of addends. 

400
True or False. 


Energy is created. 

False. 



400

What happens when when two objects of different temperatures come in contact with each other? 

Each object is going to try to reach an equilibrium. 

400

 Engineers design computers to cool down quickly so they do not break. What happens to the molecules in a computer when the temperature of the computer decreases?

The energy of the molecules in the computer decreases.

500

How would you describe an object's kinetic energy when it is hot? 

The object's energy will be high. 

500

Object one has four molecules and object two has three molecules. Which object has more total thermal energy? 

Object one has more total thermal energy because it has more molecules . 

500

True or False. 

Energy isn’t created or destroyed. Therefore, as energy transfers, it increases in one part of the system as it decreases in another part of the system.

True. 

500

How does the temperature of the front pipe compare with the temperature of the back pipe before the pipes touch? What will happen after the pipes have been touching for a while?

 Before the pipes touch, the front pipe is hotter than the back pipe. Once the pipes are touching, the front pipe will transfer kinetic energy to the molecules in the cooler back pipe until both pipes reach the same temperature, which will be in between their starting temperatures.

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