Thermal Energy

A barefoot student steps on a hot concrete surface. Most of the heat transferred to the student’s skin by this contact is by the process of—

• convection
• conduction
• vaporization
• radiation

A student opens the top window and the bottom window in a hot room. What statement best describes the heat transfer occurring in the room?

• conduction
• radiation
• convection
• evaporation

what is conduction?

• direct touch
• air or liquids
• heat waves/ light waves
• drinking hot coffee

what is convection

• direct touch
• air or liquids
• heat waves or light waves
• sunbathing outside

How does air travel?

• they don't travel
• hot to cold
• cold to hot
• All of the above

How do molecules at warm temperatures differ from molecules at cool temperatures? 

• a.  At warm temperatures, molecules move around more
• b.  At warm temperatures, molecules grow in siz
• c.  At warm temperatures, molecules exchange electrons more easil
• d.  At warm temperatures, molecules combine with each other more easil

What is the difference between heat and temperature?    

• a.  Temperature measures the motion of molecules, and heat is the energy of that motion
• b.  Temperature is measured by a thermometer, and heat is measured by a barometer
• c.  Heat is measured in calories, and temperature is measured in joules
• d.  Heat is caused by the sun, and temperature is caused by conditions in the atmosphere

Why is there more thermal energy in an iceberg than in a pot of boiling water?    

• a.  The pot insulates the heated molecules
• b.  Most icebergs are fairly warm to the touch
•   c.  Icebergs contain many more molecules than pots of water
•   d.  Water does not hold heat very well

If a cup of hot chocolate is put in the microwave, would that add or remove thermal energy to the hot chocolate.

• Thermal Energy is Added

• Thermal Energy was Removed

In what state of matter is kinetic energy the highest most likely?

• Solid

• Liquid

• Gas