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Vocabulary
Units and Variables
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Calculations
Relating Concepts
100
what are the two most commonly used scales to measure temperature?

Fahrenheit and Celsius

100

In what unit is energy measured?

J, Joules

100

As the temperature of an object decreases, its thermal energy _______________

decreases

100

2 kg of copper was heated from 5*C to 10*C. How much energy was used to heat the copper? (Specific heat of Cu is 1 J/kg x *C)

10 J

100

what unit is mass measured in?

kilogram

200

measure of the average kinetic energy of the particles that make up that object

temperature

200

In the formula Q = m(Tf - Ti)C, the variable Q represents:

Change in thermal energy

200

If the mass of an object decreases, the thermal energy of that object ___________________

decreases

200

5 kg of zinc was heated from 15*C to 40*C. How much energy was used to heat the zinc? (Specific heat of Zn is 2.5 J/kg x *C)

3125 J

200

the ability to cause change or do work

energy

300

the sum of the kinetic energy and the potential energy of all of the particles that make up an object

thermal energy

300

In what unit is specific heat measured?

J/kg x *C

Joules per kilogram times degrees Celsius

300

Objects that are cold to the touch have __________ kinetic energy than objects hot to the touch.

Less

300

15.5 kg of iron was cooled from 95*C to 30*C. How much energy was used to heat the iron? (Specific heat of Fe is 3.3 J/kg x *C)

3324.75 J

300
what's the main difference between kinetic and potential energy?

kinetic energy is energy in motion, potential energy is motionless, stored energy 

400

energy that is transferred between objects due to a temperature difference

heat

400

In the formula Q = m(Tf - Ti)C, the variables (Tf - Ti) represent:

Final temperature - initial temperature

OR

Change in temperature

400

Thermal energy is dependent upon these two things:

Mass and temperature

400

What is the specific heat of an unknown substance if a 6 kg sample releases 38 J as its temperature changes from 15*C to 25*C?

0.63 J/kg x *C

400

energy is easily ______________ from one form to another

converted

500

amount of heat needed to raise the temperature of 1 kg of that material by 1 *C

specific heat

500

In the formula Q = m(Tf - Ti)C, the variable C represents:

Specific heat

500

In all matter, atoms and molecules are in _____________ motion.

Constant, random

500

What is the specific heat of an unknown substance if a 7.8 kg sample releases 4 J as its temperature changes from 70*C to 58*C?

0.04 J/kg x *C

500

Name the three subatomic particles that make up atoms.

proton, electron, neutron