Ch 1 Flashcards
1
Q
Chemistry is:
A
- the study of matter and its changes
- known as the central science
- relates to biology, physics & geology
2
Q
What is Matter?
A
- Matter is anything that has mass and takes up space.
* Matter has both physical and chemical properties
3
Q
Physical properties are:
A
- Characteristics observed or measured without changing the identify of a substance.
- Shape, physical state, odor, boiling and freezing points, density, and color of that substance.
4
Q
Solids
A
Have definite volumes and shapes
5
Q
Liquids
A
Have definite volumes, but take the shapes of containers
6
Q
Gases
A
Have no definite volumes or shapes
7
Q
Physical Changes are those that occur without changing the identity of the substance
A
- Phase changes (changes in physical state)
- Dissolving
- Mixing (without a reaction)
8
Q
Chemical properties describe the ability of a substance:
A
- To interact with other substances
* To change into a new substance
9
Q
Alchemists
A
- Attempted to turn base metals into gold
* Attempted to find the “Elixir of Life”
10
Q
Scientific Method
A
The scientific method is the process used by scientists to explain observations in nature.
11
Q
The scientific method involves:
A
- Making Observations
- Writing a Hypothesis
- Doing Experiments
- Proposing a Theory
12
Q
Periodic Table
A
- Primary resource for a chemist as well as other scientists.
- Lists all the known elements in a “periodic way”
13
Q
Element
A
a substance that can not be broken down into simpler substances by chemical means.
