Knippium Chemistry

If you got a problem – yo, we’ll solve it!  (But, what are problems?)

 

Plan a Strategy:

1.  predict a solution

2.  Look for patterns

3.  Develop a model or idea, system, and/or structure that represents what you are trying to explain

4.  Break the problem down

 

Scientific Method – Meet Professor PHEOC!

       Problem – situation in which something appears to be missing 

       Hypothesis – testable prediction

       Experiment – organized procedure for testing a hypothesis

       Observation – using your senses to gather information, instruments

       Conclusions

 

Use what you know about the problem

 

Control – needed to draw a conclusion, standard for comparison

 

Constant – factor that does not change or vary in an experiment

Standards of Measurement

 

SI prefixes

 

Factor	Name	Symbol & Factor
109	giga	G   1 000 000 000
106	mega	M    1 000 000
103	kilo	k    1000
10-1	deci	d      0.1
10-2	centi	c    0.01
10-3	milli	m    0.001
10-6	micro	µ    0.000 001
10-9	nano	n   0.000 000 001

 

SI base units

 

	SI base unit
length	meter	m
mass	kilogram	kg
time	second	s
thermodynamic temperature	kelvin	K

 

 

 

 

 

Definitions of the SI base units

Unit of length	meter	The meter is the length of the path traveled by light in vacuum
Unit of mass	kilogram	The kilogram is the unit of mass;
Unit of time	second
Unit of thermodynamic temperature	Kelvin	The Kelvin, unit of thermodynamic temperature

0˚C = 273 Kelvin

SI derived units – Combining SI units together

Table 2.  Examples of SI derived units
	SI derived unit
area	square meter	m2
volume	cubic meter	m3
speed, velocity	meter per second	m/s
acceleration	meter per second squared	m/s2
mass density	kilogram per cubic meter	kg/m3

 

 

 

 

Graphing

 

Line graph – used to show trends of how data changes over time

 

Bar graph – comparing collected info

 

 

Circle graphs – used to show how a fixed quantity is broken down into parts.  The circular pie represents the total.