Thermal Energy Pre Assessment

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?

• The molecules of the soup in the pot are moving and the molecules of the soup in the freezer are not moving.

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

• There is no difference because they have the same molecules.

• The molecules of the soup in the freezer are smaller than the molecules of the soup in the pot

A chef takes four pans from different parts of her kitchen and puts them in two stacks. The diagram above shows the pans before they touch each other. Use the information in the diagram to answer the question.
After the pans have been touching for a while, which of the two bottom pans will be cooler, and why?

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

• Before the pans touch, the two pans are different temperatures. Once the pans are touching, both kinetic energy and cold energy will transfer between the molecules in the two pans until both pans reach the same temperature, which will be in between their starting temperatures.

• Before the pans touch, the bottom pan is hotter than the top pan. Once the pans are touching, the cooler top pan will gain kinetic energy until the molecules in both pans have an energy of 70, because hotter things increase the temperature of cooler things.

Flori has one bucket of paint outside and one bucket of paint in her garage. Both paint buckets are the same size and have the same number of molecules. She brings the bucket in from outside and is going to stack it on top of the bucket in the garage. The diagram above shows the buckets now, before they touch. Use the information in the diagram to answer the question.

How does the temperature of the garage bucket compare with the temperature of the outside bucket before the buckets touch? What will happen after the buckets have been touching for a while?

• Before the buckets touch, the two buckets are different temperatures. Once the buckets are touching, both kinetic energy and cold energy will transfer between the molecules of the two buckets until both buckets reach the same temperature, which will be in between their starting temperatures

• 
  Before the buckets touch, the garage bucket is cooler than the outside bucket. Once the buckets are touching, the hotter outside bucket will transfer kinetic energy to the molecules in the cooler garage bucket until both buckets reach the same temperature, which will be in between their starting temperatures.

• Before the buckets touch, the garage bucket is hotter than the outside bucket. Once the buckets are touching, the cooler outside bucket will gain kinetic energy until the molecules of both buckets have an energy of 18, because hotter things increase the temperature of cooler things.

• 
  Before the buckets touch, the garage bucket is hotter than the outside bucket. Once the buckets are touching, the garage bucket will transfer kinetic energy to the molecules in the cooler outside bucket until both buckets reach the same temperature, which will be in between their starting temperatures.

When a moving object collides with an object that isn’t moving, what happens to the kinetic energy of each object?

USE THE SENTENCE FRAMES!!

CLAIM: My claim is _____ (The answer to the question)

EVIDENCE: My evidence shows ______ (What did you see in the pie chart?)

ARGUMENT: My evidence supports this claim because_______.

Name at least 1 type of energy.

Thermal energy moves from ____ temperature objects to ___temperature objects

Select all that are true.

How is heat transferred?

• Convection

• Conduction

• Movement

• Radiation