Heat Transfer + Phase Change

Which of following have thermal energy?

• 38*C Monkey

• -200*C Carbon Dioxide

• 2,000*C Fire

• All of the above

Thermal energy of an object depends on...

• Mass + Volume

• Mass + Temperature

• Temperature + Volume

• Temperature + Pressure

What is "heat"?

• Thermal energy being transferred

• Temperature of object

• Total energy of all particles in sample

• density of particles

How is thermal energy transferred between two objects?

• when particles collide with DIFFERENT temperatures

• when particles collide with the SAME temperature

• when particles collide with HIGH temperatures

• when particles collide with LOW temperatures

slow-moving particles have

• a higher temperature

• a lower temperature

• high kinetic energy (KE)

• high thermal energy

In what direction does heat transfer?

• warmer to colder

• colder to warmer

• anyway it pleases

Why does a teaspoon of 100*C water have a higher temperature, but less thermal energy - compared to a bucket of 50*C water?

• teaspoon molecules move faster, but there are less total molecules

• teaspoon molecules move slower, but there are less total molecules

• teaspoon molecules move faster, but there are more total molecules

• teaspoon molecules move slower, but there are more total molecules

Rock A and Rock B are both the same temperature, but Rock A weighs more than Rock B.

Which block has LESS thermal energy?

• Rock A

• Rock B

• Both have same

• neither have thermal energy

What would happen to the volume of a substance when you cool it?

• Increase

• Decrease

• Would not change

What would happen to the mass of a substance when you cool it?

• Increase

• Decrease

• Would not change