Vocabulary
Define Evaporation
Matter turning from liquid to gas
The three (main) states of matter
BONUS: 500 points!
Solid, Liquid, Gas
Give 2 examples of a physical change.
Answer varies.
The definition of a mixture.
A combination of substances that are NOT chemically bonded
Write the equation that relates density, mass, and volume on the board.
D=m/v
Define Solute
The substance that is being dissolved
Two factors that affect state changes.
Give 2 examples of a chemical change.
BONUS: 400 Points!
Answer varies.
Unsaturated: less solute than possible
Saturated: maximum amount of solute
Supersaturated: more than the maximum amount of solute
Give an example of an object with HIGH mass and LOW volume.
Dumbbell weight, sand, water, etc.
Define Physical Change
A change that is usually reversible and affects size and/or shape. Does NOT affect chemical bonds.
Gas
The type of change that is IRREVERSIBLE
Chemical Changes
What is needed to create a supersaturated solution? Give an example.
Heat! Jello, iced tea, etc.
Give an example of an object with HIGH volume and LOW mass. Also tell whether the density will be high or low.
Beach ball. Has low density.
Define Pressure
Force per Unit Area
Explain why water droplets form on a cold drink on a hot day.
Gaseous water encounters colder temperatures, causing them to slow down and condense.
Is cooking an egg PHYSICAL or CHEMICAL?
Chemical
The two qualifications for a substance to be considered a "solution".
1. Molecules are evenly distributed.
2. Molecules end in the same state of matter.
If a 10kg block takes up 2 L of space, what will its density be?
5 kg/L.
Define Elasticity
The ability of a material to resume its normal shape after a stress is removed
Give two examples of plasma
Lightning, Solar wind, Aurora, Fluorescent Light, Nuclear Fireball
Rusting of Iron
Fireworks
Draw on the board a diagram showing how the terms "mixture", "solution", "homogeneous", and "heterogeneous" are related.
A solution is a type of mixture. A solution is the same as a "homogeneous mixture".
Give 3 possible units for density.
g/L, kg/m³, g/cm³