Matter And Measurments Flashcards
Chemistry
Properties and changes of materials
Matter
Physical material of the universe
Occupies space
Substance
Fixed composition
Distinct properties
I.e. Water
Mixture
Combination of 2 or more substances
Each retains its own properties
Can be separated by physical means (evaporation, filtration, etc)
I.e. Koolaid
Heterogeneous
Non-uniform
I.e. Soup
Homogeneous
Solution
Uniform throughout
I.e. Clear air
Compound
Composed of 2 or more different elements
Composition is always the same for pure elements
I.e. Water will always be H and 2O
Physical Properties
Can be measured without changing identities
I.e. Boiling point
Chemical Properties
The way a substance reacts to other substances
I.e. Flammability
Physical Changes
Changes in state but not composition
I.e. Water to ice
Chemical Changes
Reaction
Combining or decomposing substances by breaking or forming bonds
I.e. H and 2O ➡ H2O