Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
24 Cards in this Set
- Front
- Back
Property
|
Any characteristic that allows one to recognize a particular type of matter and to distinguish it from other types
|
|
Element
|
100 basic substances that make up all matter. Cannot be decomposed into simpler substances
|
|
Atoms
|
The building blocks of matter. Each element has a specific type of atom
|
|
Molecules
|
two or more atoms joined together in specific shapes
|
|
Gas
|
State of matter that has no fixed shape and conformes to the container
|
|
Liquid
|
distinct volume, no specific shape
|
|
Solid
|
Both definite shape and volume
|
|
Pure Substance/Substance
|
Matter that has distinct properties and a composition that doesn't vary from sample to sample
|
|
Compounds
|
Substances composed of two or more elements
|
|
Mixtures
|
combinations of two or more substances in which each substances retains its own chemical identity.
|
|
Diatomic
|
Existing naturally with two atoms ex. O2
|
|
Law of constant composition/law of definite proportions
|
The observation that the elemental composition of a pure compound is always the same
|
|
Physical Properties
|
Can be measured without changing the identity and composition of a substance. Color, odor, density, melting point, boiling point, and hardness.
|
|
Chemical Properties
|
Describe the ways a substance may change (react) to form other substances. ex. flammability.
|
|
Intensive properties
|
Ones that do not depend on the amount such as temp, MP, and density
|
|
Extensive properties
|
Depend on the amount of the sample, with two examples being mass and volume.
|
|
Physical changes
|
a substance changes appearance, but not composition. ex. all changes in state
|
|
Chemical changes/chemical reactions
|
a substance is formed into a chemically different substance. ex. combustion
|
|
Distillation
|
Boiling off a liquid to separate it
|
|
Chromatography
|
"the writing of colors"
|
|
Scientific Method
|
Guidelines for the practice of science. obs, pattern, form & test hypo, theory
|
|
Hypothesis
|
Tentative explanation
|
|
Scientific Law
|
concise verbal statement or a mathematical equation that summarizes a broad variety of observations and experiences
|
|
Theory
|
an explanation of the general causes of certain phenomena, with considerable evidence or facts to support it.
|