1. The Way Science Works

2. CRITICAL THINKING Critical Thinking
A step by step way of logically solving a problem.
Which is a better buy of peanut butter? 16 oz. at $3.59 or 8 oz. at $2.19.
If you are doing homework and the lights go out, what would you do?

3. Scientific Method General way to organize you thinking as a scientist
Observe
Question
Collect data
hypothesis
Experiment
Conclude

4. Testing Hypothesis and Conducting Experiments
Scientists use CONTROLLED experiments to test hypothesis.
VARIABLES are things that can change an outcome
Conducting Expermients
Keep all variables constant, but ONE you are testing for.
Why?

5. Units of Measurement
There are several different metric prefixes and meanings to help express small and large numbers.

6. SI units (International System)
Quantity
Unit
Abreviation
Length
Meter m
Mass
Kilogram kg
Time
Second s
Temperature
Kelvin K
Amount
Mole
mol
Electric Current
Ampere A
Luminous Intensity
Candela cd

7. Metric Prefixes and Meanings
Giga-(G) Billion ,000,000,000
Mega-(M) Million ,000,000
Kilo-(k) thousand 1,000
Deci-(d) tenth 0.1
Centi-(c) hundredth 0.01
Milli-(m) thousandth 0.001
Micro-(m) millionth
Nano-(n) billionth

8. Metric Prefixes and Meanings
These are the prefixes that make the number larger than one or the base unit.
Mega-1,000,000
Kilo-1,000
Giga- 1,000,000,000

9. Metric Prefixes and Meanings
Mega- 1,000, or 1X106
Can you think of something that you have heard with Mega- used as a prefix?
Megabyte means 1,000,000 bytes
Computer language

10. Metric Prefixes and Meanings
Kilo- 1,000
What have you heard about with the prefix kilo- used?
How about kilometer or kilogram
How many meters in 1 kilometer?

11. Metric Prefixes and Meanings
Giga- 1,000,000,000
What do we use in society with Giga-?
How about a Gigawatt?
How many watts in a gigawatt?

12. Measurements

13. Metric Prefixes and Meanings
What prefix means 1,000,000?
What is another way to write it’s value?

14. Metric Prefixes and Meanings
What prefix means 1,000?
How many liters are in 1 kiloliter?

15. Metric Prefixes and Meanings
These are the prefixes that make the number less than one or the base unit
Deci- 0.1
Centi- 0.01
Milli
Micro or 1X10-6
Nano or 1X10-9

16. Metric Prefixes and Meanings
Deci- 0.1
Think about a decimal point
Every time you move the decimal point 1 time you are changing the number by 0.1
0.1
0.01
0.001
0.0001

17. Metric Prefixes and Meanings
Centi- means 0.01
Think of length measurements for an example of this one
That’s right a centimeter

18. Metric Prefixes and Meanings
Milli
Let’s think about weight and volume.
What is the unit of the medicines you take?
Milligrams or milliliters

19. Metric Prefixes and Meanings
Micro or 1X10-6 or millionth
Have you ever heard of a microorganism?
It is something or 1X10-6 smaller than a normal organism

20. Metric Prefixes and Meanings
Nano or 1X10-9
Nanosecond is an extremely small amount of time
It is or 1X10-9 trillionth of a second

21. Metric Prefixes and Meanings
What does deci- mean?
What does centi- mean?
How about milli-
And micro-?
Finally Nano-?
Another way of writing micro-
Another way of writing nano-

22. Metric Prefixes and Meanings
You my friends are now……………..
Masters of Measurement

23. Making Measurement Mass- amount of matter in an object
Weight- measure of gravities force on an object

24. Length and Volume Length-length between two points
Volume- derived from length. Measure of the size of a 3D body