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

The diagram to the right shows a solid iron bar that is being heated in a flame. The primary method of heat transfer in the solid iron bar is—

• convection
• conduction
• absorption
• 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

what is radiation?

• direct touch
• air or liquids
• heat waves/ light waves
• touching the cookies out of the oven

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

The heat from a lamp allows a lizard to remain warm. This is an example of which type of heat transfer?

• radiation
• conduction
• convection
• insulation

Which will most likely occur when raw egg is placed on black pavement on a hot, summer day?

• The pavement will conduct the heat and cook the egg.
• The egg will reflect the heat and make the pavement hotter underneath.
• The egg will absorb the heat  and leave the pavement hotter underneath.
• The pavement will absorb the heat from the egg, and the egg will stay raw.