Energy Transfer

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

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 total energy of all the particles in a sample of matter is called —————

• Total Energy

• Thermal Energy

• Kinetic Energy

• Particle Energy

Temperature of a material depends upon the average —————— of its particles

• Kinetic energy

• Thermal energy

• Heat energy

• Particle energy

Thermal energy is transferred from————-

• A cooler object to a hotter one

• A hotter object to a cooler one

You get sunburned due to __________ from the sun.

• conduction

• convection

• radiation