16 terms

# 8th Grade Science: 2-1 & 2-2 Properties and States of Matter

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Matter
Anything with mass and volume
Mass
Amount of matter in an object (Kilograms)
Weight
The pull of gravity on an object (measured in Newtons)
Volume
The amount of space an object takes up (liters=liquid, cubic centimeters=solids)
Density
Mass per unit volume of an object (g/L)
Physical Properties
color, shape, hardness & texture
4 phases of matter
solid, liquid, gas & plasma
Solids
Definite shape and volume
Crystalline Solids
solids made up of crystals (particles arranged in a repeating pattern)
Amorphous Solids
solids that lose their shape under certain conditions (glass & candle wax are examples)
Liquids
No definite shape. However, they do have a definite volume. (1 Liter is 1 Liter regardless of the container it occupies) Particles are close together, but are free to move around.
Viscosity
The resistance of liquid to flow. (Honey has a high viscosity--it flows very slowly)
Gas
No definite shape or volume. (It will fill all available space in a container)
Boyle's Law
If the volume of a gas is reduced, the number of particle collisions will increase. Gas pressure will increase.
Charles's Law
The volume of a fixed amount of gas varies directly with the temperature of the gas.
Plasma
RARE on Earth-Matter is very high in energy and very dangerous to living things.