1. Unit One
Here we go…

2. Chemistry
The relationship between the properties and structure of matter.
Always evolving…it is what chemists do!

3. Chemistry
Define serendipity.
Alexander Fleming
Penicillin, vulcanized rubber
Any study of science starts with the scientific method.
It is a systematic gathering of information.

4. Chemistry
Demonstration # 1.
The rising column.

5. Chemistry
Demonstration # 2.
Are my eyes deceiving me?

6. Summer’s OVER……
Convert:
150 meter to millimeters
97.4 grams to kilograms
kilograms to milligrams

7. Qualitative vs. Quantitative
Qualitative- describes a property without using numbers.
Quantitative- describes a property with numbers.

8. Qualitative vs. Quantitative
Give an example of a qualitative measurement of size, color, brightness, length.
Give an example of a quantitative measurement of size, color, brightness, length.

9. Accuracy vs. Precision
Accuracy – how close a measurement is to the true value.
Precision – how close a set of measurements are to each other

10. Accuracy vs. Precision

11. Who is Accurate? Who is Precise?

12. Accuracy vs. Precision
To estimate the accuracy of a measurement, it has to be compared to the correct value.
Usually done as a percentage.

13. Accuracy vs. Precision
% Error =
accepted - experimental  X 100
accepted value