1. Introduction to Science
Science involves observation and a general belief that the universe can be described by basic rules and these rules can be applied method and study.
There are numerous branches of science, but all are related to one another in some way

3. Science and Technology
Pure Science involves the constant search for new knowledge.
Applied Science take the work of pure scientist and look for practical applications. This is called Technology

4. Branches of science Two main branches are social and natural.
I will be teaching natural

5. Branches of science

6. Theories
Most logical explanation that has been tested by repeated observation.
Must explain observation simply and clearly
Experiments that illustrate a theory must be repeatable

7. Theories
Many theories change over time. Mainly because new discoveries are always being made.
Ex. Steady State theory
or Big Bang Theory

9. Law A summary of an observed natural event.
REMEBER, they do not explain the natural phenomenon.

11. Reliability of Measurements
Accuracy- the extent to which a measurement approaches the true value. (bull’s eye)
Ex. Your results in an experiment for the density of water is 1 g/ml.

12. Reliability of Measurements
Precision – the degree of exactness of a measurement.
-the consistency of results in an experiment

14. Measuring Precision

15. Measuring Precision
More Precise

16. Significant Digits (figures)
Measuring Precision
Significant Digits (figures)
Numbers that contain an actual measured value
Six Rules

17. Sig Fig Rules All non-zero digits are significant.
Ex has 4 sig figs
Ex has 5 sig figs
2. Any zeros between two significant digits are significant
Ex has 5 sig figs
Ex has 6 sig figs

18. Sig Fig Rules
3. All final zeros after the decimal point are significant.
Ex has 3 sig figs
Ex has 5 sig figs
4. Any zero’s used solely for spacing the decimal point are NOT significant. The zeros are just place holders.
Ex has 1 sig figs
Ex has 3 sig figs
Ex. However has 4 sig figs

19. Sig Fig Rules
5. The product or quotient will be reported as having as many significant digits as the number with the least significant digits.
Ex x 42.1 =
=533
6. The sum or difference must have the same number of decimal places than the number with the least number of decimal places.
Ex = 30.63
= 30.6

20. SCIENTIFIC NOTATION A way of expressing really big or small numbers.
N x 10A
N is the proper significant digit
A is the number of times you moved decimal
Positive = big, Negative = small

21. The Metric System Universal language of measurement
Scientist all over the world use, thus making it easy to communicate data.
Numbers are easy to convert

23. SHOULD HAVE USED THE METRIC SYSTEM

24. International System

27. The Scientific Method
This is an organized way of solving a problem or thinking.
All scientific questions begin with observation.
Made up of several steps.
You use many of the same steps when solving everyday problems.

28. The Scientific Method

29. Organizing Data
Graphs- a way for scientists to easily read and study data and information.
Line, bar, and pie graphs
Each graph has its own particular value when presenting info.