Energy
Define Energy.
The ability to do work.
The 3 states of matter are ______
solid, liquid, gas
State of matter where the particles have enough thermal energy to move around but not enough to completely break free from each other.
Liquid
Kinetic energy is the energy of______?
Motion
Which term describes substances that can flow, including both liquids and gases?
Fluid
When your warm hand touches a cold hand rail in the winter, what direction does the thermal energy flow?
Thermal energy would flow from your hand into the rail by conduction.
The law of conservation of energy states that____.
The total amount of energy in the universe remains constant.
Deposition is the phase change from ____ to ____.
gas to solid
What must be true for conduction to occur between two objects?
a) A fluid must flow from one object to the other.
b) Both objects must be insulators.
c) The objects must touch and be at different temperatures.
d) The objects must touch and be at the same temperature.
C. The objects must touch and be at different temperatures.
What is the metric unit for energy?
Joule
During a phase change from ice to water, temperature remains constant while added thermal energy is used to ________.
a) increase the speed of steam particles
b) overcome the attractive forces between ice particles
c) overcome the attractive forces between water particles
d) transform ice particles into steam
b) overcome the attractive forces between the solid ice particles
Thermal energy is the energy an object has because of ________.
a) being hot or cold
b) the movement of its particles
c) heat flowing out of the object
d) having an average temperature
b) the movement of its particles
What happens to energy as it is transformed?
It becomes less usable.
Order the states of matter for any substance from least thermal energy to greatest thermal energy.
a) gas, solid, liquid
b) liquid, solid, gas
c) solid, gas, liquid
d) solid, liquid, gas
d) solid, liquid, gas
A thermal conductor is a material that ________.
transfers thermal energy easily