Phases of Matter
Physical Science
Objective 5.03
Solid


A solid is a substance that holds its
shape
The particles that make up a solid
substance have low kinetic energy
and are packed tightly together
Solid Particles
Liquid


A liquid is a substance that holds its
shape in a container
The particles that make up a liquid
substance have an increased kinetic
energy and are able to spread
further apart
Liquid Particles
Gas


A gas is a substance that does not
hold its shape
The particles that make up a gas
substance have high kinetic energy
and are able to move freely in the
space available to them
Gas Particles
Phase Changes

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Substances change from one state of
matter to another as heat is added to the
substance
The absorption or release of heat leads to
a change in kinetic energy of the
substances particles
As the kinetic energy of particles changes
the state of matter changes
Phase Change:
Solid -> Liquid


As heat is added to a solid, the solid
will begin to melt
Every solid has a different
temperature at which it melts. This
temperature is called the melting
point
Phase Change:
Liquid -> Gas


As heat is added to a liquid, the
liquid will begin to vaporize
Every liquid has a different
temperature at which it vaporizes.
This temperature is called the boiling
point
Phase Change Diagram
Boiling Point
Melting/Freezing
Point
States of Matter along a Phase
Change Diagram
1.
http://8science.files.wordpress.com/2009/01/image008.jpg
2. http://www.dorlingkindersley-uk.co.uk/static/clipart/uk/dk/sci_matter/image_sci_matter001.jpg
3. http://www.pullouttheplug.co.uk/ks3_chemistry/images/content/liquid.png
4. http://www.dkimages.com/discover/previews/914/5019731.JPG
5. http://www.kentchemistry.com/images/links/matter/aim10.5.jpg
6. http://library.tedankara.k12.tr/chemistry/vol1/physics/trans67.jpg