Thermal Energy-Chapter 1

Thermal Energy-Chapter 1 Review

February 8, 2021

Multiple Choice

Engineers design devices like Ipads and cellphones to cool down quickly so they do not overheat. What happens to the molecules in an Ipad when the temperature of the Ipad decreases?

• The energy of the molecules in the Ipad decreases (less motion )

• The energy of the molecules in the Ipad increases (more motion).

• The cold energy of the molecules in the Ipad increases.

• The Ipad loses heat molecules.

Multiple Choice

Alana is cooking rice in a pot. When she leaves the pot on the stove for a while, the temperature of the rice increases. What happens to the molecules of the rice when the temperature of the rice increases?

• The cold energy of the molecules in the rice decreases (less speed)

• The energy of the molecules in the rice decreases

• More heat molecules combine with the molecules in the rice.

• The energy of the molecules in the rice increases (more speed)

Open Ended

One difference of the water heater systems that Mr. Chang the principal is proposing for Riverdale High School is

Open Ended

One similarity of the water heater systems that Mr. Chang the principal is proposing for Riverdale High School is

Poll

When you reduce the temperature of a sample from 100 degrees Celsius to 30 degrees Celsius , the molecules move faster because they have more kinetic energy.

• TRUE

• FALSE

• MAYBE

• I'M NOT SURE

Open Ended

Calculate the average kinetic energy of the molecules in sample 1 and sample 2. Which sample has a higher temperature? How do you know?

Multiple Choice

Amy and Payton are camping and have potatoes wrapped in foil to eat. Payton put her potato in the campfire for a while, but Amy did not. Now Payton’s potato has a high temperature. What is the difference between the molecules of the two potatoes?

• There is no difference because both potatoes are made of the same type of molecules.

• The molecules of Amy’s potato are smaller than the molecules of Payton’s potato.

• The molecules of Payton’s potato are moving and the molecules of Amy’s potato are not moving

• The molecules of Payton’s potato are moving faster than the molecules of Amy’s potato.

Poll

When something heats up, it moves faster, and when it cools down, it moves slower.

• AGREE

• DISAGREE