Chapter 9 - Heat Technology Sections 1 &2

Temperature is a measure of the average _______ of the particles in an object.

• potential energy

• kinetic energy

• mechanical energy

• size

Under what condition can thermal energy be transferred?

• the objects must be at different temperatures

• the objects must be hot

• the objects must have a lot of energy

• the object must be large

In a convection current, warmer particles ​ (a)   because they are ​ (b)   than cooler particles

• rise
• less dense
• fall
• more dense

The faster the particles of an object are moving, the ​ (a)   the temperature of an object.

• higher
• lower

All substances will expand equally with the same change in temperature.

• true

• false

At what temperature does water boil?

• 212 degrees F

• 100 degrees C

• 373 K

• all of the above

If two objects come in contact with each other, and one object is warmer than the other object, what happens?

• Energy is transferred from the warmer object to the colder object

• Both objects get colder

• Energy is transferred from the colder object to the warmer object

• Both objects get warmer

The thermostat in your home has a ​ (a)   strip that coils or uncoils with changes in ​ (b)   .

• bimetallic
• temperature
• metallic
• SI

You can feel the warmth of a portable heater when you are standing near it due to ​ (a)  

• radiation
• conduction
• convection

Thermal energy is not related to the number of particles in an object.

• True

• False