Thermal Energy

What happens to kinetic energy when temperature increases?

• Kinetic energy increases

• Kinetic energy decreases

• Kinetic energy does not change

What happens to kinetic energy when temperature decreases?

• Kinetic energy increases

• Kinetic energy decreases

• Kinetic energy does not change

What happens to temperature when kinetic energy increases?

• temperature increases

• temperature decreases

• temperature does not change

What happens to temperature when kinetic energy decreases?

• temperature increases

• temperature decreases

• temperature does not change

What happens to the speed of molecules when temperature increases?

• the speed of molecules increases

• the speed of molecules decreases

• the speed of molecules does not change

What happens to the speed of molecules when temperature decreases?

• the speed of molecules increases

• the speed of molecules decreases

• the speed of molecules does not change

Are the molecules in the picture moving fast or slow?

• fast

• slow

Are the molecules in the picture moving fast or slow?

• fast

• slow

What will happen after the layers have been touching for a while?

• Before the layers touch, the outer layer is hotter than the inner layer. Once the layers are touching, the outer layer will transfer kinetic energy to the molecules in the cooler inner layer until both layers reach the same temperature, which will be in between their starting temperatures

• Before the layers touch, the outer layer is hotter than the inner layer. Once the layers are touching, the cooler inner layer will gain kinetic energy until the molecules of both layers have an energy of 90, because hotter things increase the temperature of cooler things.

• Before the layers touch, the outer layer is cooler than the inner layer. Once the layers are touching, the inner layer will transfer kinetic energy to the molecules in the cooler outer layer until both layers reach the same temperature, which will be in between their starting temperatures.

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 all of the soup is made of the same type of molecules.