Questions A
What is heat?
a. A type of energy
b. A way of measuring the amount of thermal energy in an object
c. The transfer of thermal energy
d. The transfer of electrical energy
a. The transfer of thermal energy
What is the total energy of all of all the particles in an object called?
a. chemical change
b. thermal energy
c. potential energy
d. nuclear energy
b. thermal energy
When the kinetic energy of the particles in an object increases, the temperature of the object:
a. increases
b. decreases
c. remains the same
d. becomes fixed at 100 degrees Celsius
a. increases
When energy transforms from one form to another, the total amount of energy in the system:
a. decreases
b. increases
c. is conserved
d. drops to zero
c. is conserved
Which of the following is NOT a good insulator?
a. Plastic
b. Rubber
c. Metal
d. Styrofoam
c. Metal
What tool do we use to measure the temperature of a substance?
a. A ruler
b. A thermometer
c. A graduated cylinder
d. A scale
b. A thermometer
Which of the following is important to generating heat?
a. Friction
b. Chemical reactions
c. Sunlight
d. All of the above
d. All of the above
What kind of materials do not conduct heat well?
a. insulators
b. conductors
c. metals
d. radiators
a. insulators
What do you call the transfer of heat from one place to another by movement of a fluid?
a. Conduction
b. Convection
c. Radiation
b. Convection
Heating through direct contact is called:
a. Conduction
b. Convection
c. Radiation
a. Conduction
The speed of two bumper cars decrease as their bumpers rub against each other. What happens to the temperature of the bumpers due to the force of friction?
a. Bother bumpers cool down
b. Both bumpers warm up
c. One bumper cools down while the other warms up.
d. Both bumpers remain the same temperature
b. Both bumpers warm up
Temperature is really a measure of:
a. How fast the atoms of an object vibrate
b. The size of atoms
c. The amount of chemical energy stored in the bonds between atoms of an object
d. The potential energy stored in the bonds between atoms of an object
a. How fast the atoms of an object vibrate
When you rub your hands together, you generate heat. How is the heat generated?
a. Friction (from rubbing hands) transforms mechanical energy into thermal energy
b. Rubbing generates electric energy, which transforms into thermal energy
c. Rubbing causes potential energy to transform into kinetic energy
d. Chemical reactions to take place in your hands, which produce thermal energy
a. Friction (from rubbing hands) transforms mechanical energy into thermal energy
Which of the following is a measurement of how much thermal energy an object has?
a. Mass
b. Volume
c. Temperature
d. Density
c. Temperature
Convert -30 degrees Celsius to degrees Kelvin
243 degrees Kelvin
Convert 20 degrees Kelvin to Celsius
-253 degrees Celsius
What do you call the transfer of heat by electromagnetic waves?
a. Conduction
b. Convection
c. Radiation
c. Radiation
What is the only form of heat transfer that occurs in space?
a. Conduction
b. Convection
c. Radiation
d. All forms of heat transfer take place in space
c. Radiation
Thermal energy always transfers from:
a. A cold to a hot object
b. A cold to a cool object
c. A hot to a cold object
d. A hot to a hotter object
c. A hot to a cold object
The TOTAL amount of thermal energy a substance has depends on:
a. The temperature of the substance
b. The number and type of atoms in the substance
c. The state (solid, liquid or gas) of the substance
d. All of the above
d. All of the above
How does the average kinetic energy of a substance change as its temperature increases?
As temperature increases, the average kinetic energy of the substance increases.
What is the difference between a conductor and an insulator?
A conductor easily transfers heats. An insulator does not easily transfer heat.
Why does it make sense that the body of a pot is made of metal but the handle is made of plastic?
The body needs to easily get hot and warm the substance(s) inside the pot. The handle should be made of an insulator so a person can hold the pot without being burned.
Describe how hot and cold fluid moves in a convection current?
A hot fluid rises. It cools and then sinks. The cool fluid becomes warm again and then rises.
Compare the amount of thermal energy a hot object has compared to a cold object. Assume both objects are made of the same material and have the same mass.
A hot object has more thermal energy than a cold object.