1. CHAPTER ONE INTRODUCTION TO SCIENCE
PHYSICAL SCIENCE
CHAPTER ONE
INTRODUCTION TO SCIENCE

2. 1.1 THE NATURE OF SCIENCE Is science: a set of FACTS? OR
an ongoing PROCESS?

4. ? ? PURE SCIENCE TECHNOLOGY
How do pure science and technology depend on each other?

5. A ________ is a tested (when possible) explanation (how or why) of a natural event.
THEORY
The KINETIC MOLECULAR THEORY states that molecules are in constant motion. Use this theory to explain why the balloon takes the shape it does.
Use the KINETIC theory to explain why the handle of a camp fork gets hot.

6. LAW
A _____ states a summary of a repeated observation about a natural event in God’s creation.

7. A MODEL is a _______ of an object or event.
MODELS MAY BE:
drawings
mental pictures
a set of rules
physical objects
computer pictures
Identify some models in our classroom….
Identify some things in the classroom that are NOT models…

8. THE WAY SCIENCE WORKS 1.2

9. It is a way of THINKING THE SCIENTIFIC METHOD is a way to
organize your thinking.
After making observations…
Question
Collect Data
Hypothesis
Experiment – only one variable!!! All other conditions controlled!!!
Conclusion
Using the Scientific Method to improve your social life.

10. It is using scientific TOOLS.
Name some tools found in our classroom…

11. It is using the METRIC system of measurement.
UNIT
TOOL
LENGTH
MASS
VOLUME
TEMPERATURE
CLICK FOR A MEASUREMENT PRESENTATION

12. SI - International System of Units
1. Based on multiples of 10
2. Common metric prefixes:
a. mega- (M) x
b. kilo- (k) x
c. hecto- (h) x
d. deka- (da) x
e. deci- (d) 0.1 x (1/10)
f. centi- (c) x (1/100)
g. milli- (m) x (1/1000)
h. micro- (u) x

13. Jason goes metric…

14. 1.3 ORGANIZING DATA

15. LINE GRAPHS MOST OFTEN USED IN SCIENCE DISPLAY DATA THAT IS CHANGING
TWO VARIABLES
_________________ “I choose this variable!”
_________________ “this depends on what happens”
How to Construct a Line Graph
Making Science Graphs and Interpreting Data

16. BAR GRAPHS
TO COMPARE DATA FOR INDIVIDUAL ITEMS

17. PIE CHARTS
TO DISPLAY DATA THAT ARE PARTS OF A WHOLE

18. Accuracy or Precision? Accuracy vs. Precision
Accuracy – a statement of how close a measured value is to the true or accepted value.
Precision – a statement of how reproducible the measured results are.

19. COMPARE AND CONTRAST WHICH WOULD YOU PREFER? ACCURACY 1. 2. 3. 4.
PRECISION 1. 2. 3. 4.
WHICH WOULD YOU PREFER?

20. Scientific Notation
What- a value written as a simple number multiplied by a power of 10.
The sun is 93 X 106 miles from earth.
Why? – Very large or very small numbers are written this way as a form of number “shorthand”.

21. Scientific Notation
What Is the Standard Form of These Tens? 2
100 10 3
1,000 4
10,000 5
100,000

22. Exponents of Ten
Notice that the number of zeros matches the exponent number… 2
100 10 3
1,000 4
10,000 5
100,000

23. What is the Exponent Form?2
500
5 x 10 =

24. Scientific Notation and Accuracy or is it Precision???
Why did mom use scientific notation?
Is the word “accuracy” used properly here?

25. Significant Figures Significant Figures Significant Figure Rules
The value reported for a measurement is rounded off so that it contains only the digits known with certainty plus one uncertain one which is the last digit.
Significant Figure Rules
To determine the number of significant figures in a reported value, start at the left and count all digits beginning with the first non-zero digit.
Examples: => 4 sig. fig.
10,200 => 5 sig. fig.

26. Significant Figures Significant Figures in Calculations
Addition & Subtraction: The number of decimal places in the answer should be equal to the number of decimal places in the value with the fewest decimal places.
Example: g g g
15.74 g
(4 decimal places)
(2 decimal places)
(3 decimal places)

27. Significant Figures Significant Figures in Calculations
Multiplication & Division: The number of significant figures in the answer should be the same as the value with the fewest significant figures.
Example:
12.36 mL x g = g mL
4 sig. fig.
2 sig. fig.
Note: Definitions and counted numbers have an unlimited number of significant figures.

28. And now to prepare for the test…
Know the branches of science.
Understand how pure and applied science differ.
Know how laws, theories, and models are alike and how they are different.
Understand metric measurement: mass length, and volume.
Types of graphs and variables.
Accuracy, precision, significant figures, scientific notation.