"Every time you see darkness around or feeling grief or
heavy about it, remember that it could be that you are
here as a bringer of light." -Fatima Ariadne
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-Review Ch. 3 Notes...
3.1 - Solids, Liquids, & Gases
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Key Ideas:
-Everything is made up of particles that are constantly moving
-The particles of solids, liquids, and gases are arranged differently and therefore behave differently; this is why solids, liquids, and gases have different properties
-SOLID: particles are tightly packed in a regular pattern; force between particles is strong, so particles do not move freely
-LIQUID: particles are close but arranged randomly; force between particles is weak, so particles move freely
-GAS: particles are not close and are arranged randomly; force between particles is very weak, so particles move freely
Kinetic Theory
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Key ideas:
-Solids, liquids, and gases all have particles that are moving, but the difference is the amount of energy they have.
-SOLID: low amount of energy, incompressible because no space between particles
-LIQUID: more energy than solids, incompressible because no space between particles
-GAS: high energy, compressible because a lot of space between particles
-3.2 The Gas Law
Key Ideas:
-Three things affect gas pressure:
1.temperature - if temp goes up, pressure goes up (video);
this is the basis of Charles's Law
2. volume - if volume goes down, pressure goes up (video); remember, it's the volume of the container, not the gas
3. number of particles - if it goes up, pressure goes up; these two relationships demonstrate Boyle's Law
-3.3 Phase Changes (review answers from worksheet)
Key ideas to write down on left side of interactive notebook:
During a phase change, a substance either absorbs or releases energy.
Endothermic - absorbs energy
Exothermic - releases energy
Examples of the six phase changes:
condensation (gas to liquid)
sublimation (solid to gas)
deposition (gas to solid)
melting (solid to liquid)
freezing (liquid to solid)
vaporization (liquid to gas)
-Chapter 3 Jeopardy!
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