Thermal Energy

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

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

Which material is the best conductor of heat?

• glass
• styrofoam
• metal
• wood

What materials would be good insulators for a handle on a pan or pot that would be used on the stove?

• wood or plastic
• metal or rubber
• wood or rubber
• copper or steel

Conduction can only occur between two objects when –

• one object is less dense than the other.
• both objects are in physical contact with each other.
• one of the objects is made of a metal.
• both objects are exactly the same temperature.

Heat will always transfer from the ___________ object to the ________ object.

• The hottest object to the coolest object.

• The coolest object to the hottest object.

• The solid object to the liquid object.

• The liquid object to the solid object.

The sun warming your skin is an example of heat transfer through 

• conduction
• convection
• radiation
• thermal electricity

The energy of moving particles is called _____.

• sound energy

• heat or thermal energy

• light energy

• mechanical energy

When particles are heated they begin to ____.

• move faster

• mover slower

• move up

• jump out of the pot

When thermal energy is applied to an ice cube, it _____.

• freezes

• stays the same

• tastes better

• melts