1. What is Chemistry?
Ch. 1

2. Chemistry
The study of _________ (anything that has _______ and occupies _____) and how it ________.

3. Scientific Method 1. Problem/Purpose
State the ___________ to be answered
2. Research
Gather background information
3. Hypothesis
Predict a _____________________.
4. Experiment
Perform a test (s) to prove or disprove ___________.
5. Data Collection
Collect _________ and ___________ from the experiment
6. Conclusion/Theory
An ___________ or _________ to the problem

4. Different terms to describe scientific ideas
__________ - an explanation of the phenomenon based on many experimental evidence
- flexible enough to be modified if new data/proof introduced
Ex. Atomic Theory
___________ - description of the observed phenomenon; doesn’t explain why or what causes it.
-stands the test of time, often without change - experimentally proven over and over - has uniformity and is universal
Ex. Law of gravity

5. Designing Experiments
Experiments require two groups: control
and experimental group so you can compare the results.
1) __________group
the standard of comparison group; all conditions are groups kept the same
2) ______________ group
- the test group; all conditions are kept
the same EXCEPT the condition being tested (_____ variable)

6. Experimental Design
Example: How does vitamin water affect plant growth?
Control group = ___________________
Experimental group = _______________
_________________________
Constants = amount of water, same type of plant, same amount of light, soil, temperature, same type of pot

7. Two types of variables 1) Independent variable = a change of
condition; ________ (i.e. an increase in concentration); usually on a _________of a graph
2) Dependent variable = a change of second condition caused by the independent variable; __________ _________ (i.e. rate or speed of chemical reaction); usually on a _______ of a graph

8. Experimental Design
Example: How does vitamin water affect plant growth?
Independent variable = ____________ (a change you make)
Dependant variable = ______________ (in cm), _____________ (a measurable result showing whether independent variable causes any change or not.)

9. Example
Independent variable =
Dependent variable =

10. Example
Independent variable:
Dependent variable:
Control: