Science Matter Review
Element
A substance composed of atoms having an identical number of protons in each nucleus. Elements cannot be reduced to simpler substances.
Chemical Indicator
A substance that changes based on the properties of another substance
Matter
Anything with mass and volume
Suspension
Can see particles with the naked eye, but will settle out over time
Phase change: Condensation
Gas→Liquid
Phase change: Deposition
Gas→Solid
Solution
Groups of molecules mixed in a completely even distribution
Phase change: Vaporization
Liquid→Gas
Phase change: Evaporation
Liquid→Gas (when boiling)
Phase change: Solidification
Liquid→Solid
Phase change: Freezing
Liquid→Solid (when getting colder)
Colloid
Particles that are no longer a solution but does not settle out
Chemical Reaction
Process where the state of at least one reactant changes
Heterogeneous
parts do not combine completely or evenly
Physical or Chemical change: cutting a slice of a cake
physical
Physical or Chemical change: cutting paper squares
physical
Physical or Chemical change: cutting the grass
physical
Physical or Chemical change: melting chocolate
physical
Physical or Chemical change: melting ice cream
physical
Physical or Chemical change: scrambling eggs in a bowl
physical
Compound
two or more different element molecules
Molecule
two or more elements chemically bonded together
Physical or Chemical change: baking a cake
chemical
Physical or Chemical change: burning gas when driving a car
chemical
Physical or Chemical change: burning logs in a fire
chemical
Physical or Chemical change: digesting food
chemical
Physical or Chemical change: making scrambled eggs
chemical
Physical or Chemical change: rusting nails
chemical
Physical or Chemical change: toasting bread
chemical
Phase change: Melting
Solid→Liquid (when getting warmer)
Atoms
The building blocks of matter--made up of protons, neutrons, and electrons
Phase Change
The changing from one mass phase (solid, liquid gas) to another
Law of Conservation of Mass
The law that mass cannot be created nor destroyed
pH
The numerical scale on which we measure acidity, neutrality, and basicness
Homogeneous
Uniform distribution
Mixture
When put together there is no chemical change-it keeps its properties, can be separated easily
