Term
|
Definition
| The smallest identifiable unit of an element. |
|
|
Term
|
Definition
| A theory that states that all matter is composed of tiny particles called atoms. |
|
|
Term
|
Definition
| Science that tries to understand how matter behaves by studying how atoms and molecules behave. |
|
|
Term
|
Definition
| A procedure that attempts to measure observable predictions to test a theory or law. |
|
|
Term
|
Definition
| A theory or law before it becomes well established; a tentative explanation for an observation or a scientific problem that can be tested by further investigation. |
|
|
Term
| Law of Conservation of Mass: |
|
Definition
| A law stating that in a chemical reaction, matter is neither created nor destroyed. |
|
|
Term
|
Definition
| Two or more atoms joined in a specific arrangement by chemical bonds. A molecule is the smallest identifiable unit of a molecular compound. |
|
|
Term
|
Definition
| Often the first step in the scientific method. An observation must measure or describe something about the physical world. |
|
|
Term
|
Definition
| The assigning of a number to an observation so as to specify a quantity or property precisely. |
|
|
Term
|
Definition
| A statement that summarizes past observations and predicts future ones. Scientific laws are usually formulated from a series of related observations. |
|
|
Term
|
Definition
| The way that scientists learn about the natural world. The scientific method involves observations, laws, hypotheses, theories, and experimentation. |
|
|
Term
|
Definition
| A proposed explanation for observations and laws. A theory presents a model of the way nature works and predicts behavior that extends well beyond the observation and laws from which it was formed. |
|
|
Term
| Antoine Lavoisier (1743-1794) |
|
Definition
| Studied combustion by burning substances in closed containers then carefully measured the mass of each container before and after. He noted that there was no change in mass during combustion. |
|
|
