Unit 1: What is Chemistry?
Day 1
What is the first thing that comes into you mind when you hear the word
"CHEMISTRY"?
Chemistry: The study of matter and its interactions.
What is matter? What are interactions?
How are these two substances different?
Water
Spaghetti
We just made observations about those substances.
Observation: the data measured, collected, perceived or noticed in an
experiment.
What are some specific ways we can make observations?
Observations can be made using...
The five senses: smell, touch, taste, hear, see
Instruments of measure: microscope, ruler, scale, thermometer, graduated cylinder
When can observations be made?
What kind of observations can be made?
Qualitative: observations of a substances' qualities
(five senses)
Quantitative: observations of a substances' measure, magnitude, number, etc.
(instruments of measure)
Write three qualitative and one quantitative observations for the picture above.
1.
1.
2.
3.
Variables:
What is a variable?
Independent Variable: The independent variable is the factor that you purposely
change or control in order to see what effect it has. It is graphed on the x-axis.
Dependent Variable: The variable that responds to the change in the independent
variable is called the dependent variable. It depends on the independent variable. It
is graphed on the y-axis.