Vocabulary
Phase Changes
States of Matter
Kinetic Molecular Theory
Phase Change 2
100
This occurs when energy (heat) is taken in or absorbed.
What is an endothermic reaction?
100
solid to liquid
What is melting?
100
definite shape and volume
What is a solid?
100
The kinetic molecular theory (particle theory of matter) says this.
What is all matter is made of tiny particles that are always in motion?
100
Water boils at this temperature (Celsius).
What is 100 degrees Celsius?
200
This is a liquid's resistance to flow.
What is viscosity?
200
gas to liquid
What is condensation?
200
no definite shape or volume
What is a gas?
200
The particles in a liquid behave this way.
What is flow around each other because heat is being added causing the particles to move faster therefore increasing the distance between them, but the particles still have a weak attraction to each other
200
In a phase change graph, this is occurring when the slope of the line is zero.
What is a change in state?
300
This is the smallest unit of matter that still retains the properties of that matter.
What is an atom?
300
liquid to solid
What is freezing?
300
lightning, fire and the aurora borealis are examples of this state of matter.
What is plasma
300
The particles in a gas behave this way.
What is move freely and rapidly because the attraction between the particles is broken from the amount of heat being added, therefore the distance between particles is increased?
300
In a phase change graph, this is occurring when the slope of the line is a positive number.
What is a change in temperature?
400
This the name of a solid that doesn't retain its shape.
What is an amorphous solid?
400
solid to gas
What is sublimation?
400
no definite shape, definite volume and takes the shape of the container it is in
What is a liquid?
400
The increase in distance between the particles in a substance when heated can be attributed to this.
What is thermal expansion?
400
Boiling and evaporation are part of this type of phase change.
What is vaporization?
500
This occurs when energy (heat) is removed.
What is an exothermic reaction?
500
The difference between evaporation and boiling.
What is evaporation takes place on the surface of the liquid and boiling takes place throughout the liquid?
500
These are the names of the 2 types of solids.
What is crystalline and amorphous?
500
This is the explanation for how melting and freezing of water takes place at the zero degrees celsius.
What is whether heat is being added or taken away from the substance at zero degrees celsius?
500
In a phase change graph for water, this will occur at 100 degrees Celsius.
What is boiling and condensation depending on whether heat is being added or taken away?
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