Lecture 1 Flashcards
1
Q
Definition of Chemistry
A
Study of matter, it’s properties, changes, and the energy associated with those changes
2
Q
Definition of Matter
A
Everything that has mass and occupies space
3
Q
Homogeneous mixture (Solution) definiton
A
Air, sea water, salt water, steel, etc
Can be seperated and is uniform in composition
4
Q
Heterogeneous Mixture
A
Can be seperated and NOT uniform in composition
Trail mix, salad dressing, etc.
5
Q
Compound
A
Pure substance that can be chemically decomposed.
H2O, CO2
6
Q
Element
A
Cannot be chemically decomposed
H, C, Fe, etc.
7
Q
Scientific Method
A
- Make observation
- Formulate hypothesis
- Design/conduct expiriment
- Observe results and compare
- Draw conclusions
- Report findings
- results from independant expiriments
- conduct additional expiriments based on hypothesis and results
8
Q
Hypothesis
A
Potential explanation for a single or small number of observations
9
Q
Thoery
A
General explanation of a set of related observations based on proven hypotheses
10
Q
Significant figures rules
A
- All non zeros are important
- Interior zeros are important
- Trailing zeros are important
