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Energy Conversion and Conservation
Math
Temperature
Thermal Energy and Heat
Other
100
There are 6 forms of energy mentioned in this unit. They are:
What are mechanical, sound, chemical, thermal, electromagnetic, and nuclear?
100
An old refrigerator required 400 J of energy to give out 50 J of energy. What is it's efficiency?
What is 12.5% (50 J/400 J) X 100% =
100
This states that all particles that make up matter are in motion.
What is the kinetic theory of matter?
100
This is the total kinetic energy of all of the particles in a substance.
What is thermal energy?
100
This type of energy transfer occurs when there is direct contact between two substances.
What is conduction?
200
The Law of Conservation of Energy states that:
What is energy cannot be created or destroyed; it can only change form?
200
A vacuum cleaner uses 120 J of energy. If 45 J are used to pull air into the vacuum cleaner, how efficient is the vacuum cleaner?
What is 37.5%
200
Describe the motion of particles in a solid, liquid, then gas.
What is vibrate, move freely/slide, move at high speeds and very far apart?
200
Energy transferred from an object at a higher temperature to a lower temperature is __________.
What is heat?
200
An ice cube melting in a cup of tea is an example of this type of energy transfer.
What is conduction?
300
Unwanted forms of energy are often lost this.
What is heat?
300
Convert 65 degrees Fahrenheit to Celsius.
What is 18.3 degrees Celsius? C = 5/9 (F-32) C = 5/9 (65 - 32) C = 18.3
300
Out of steam or ice water, which one has a higher average kinetic energy?
What is steam?
300
___________ depends on how many particles are in a substance, unlike temperature.
What is thermal energy?
300
Amounts of thermal energy are expressed as _____.
What are joules?
400
True or False Energy transformation is always 100% efficient.
What is false?
400
Convert 200 degrees Celsius to Fahrenheit.
What is 392 degrees Fahrenheit? F = (9/5 x 200) = 32
400
Out of a frozen juice bar, or a glass of juice, which one has a lower kinetic energy?
What is a frozen juice bar?
400
The amount of energy needed to raise the temperature of 1 g of water by 1 degree is a ___________.
What is calorie?
400
A ceiling fan being used to blow warm air down to the floor is an example of __________.
What is convection?
500
Efficiency is the ratio of useful out put energy to input energy. The equation for this is:
What is Percent efficiency = Energy out/Energy in x 100%
500
Water boils at 100 degrees Celsius. What would the corresponding temperature for the Kelvin scale be?
What is 373? K = C + 273 K = 100 + 273.
500
The freezing point on this scale is 0 and the boiling point is 100.
What is Celsius?
500
Adding heat adds energy, causing _________ between particles to break. This allows a state of matter to change.
What are bonds?
500
If 2 bowls of soup are at the same temperature, but the bowls are different sizes, which bowl will have more thermal energy?
What is the larger bowl?