Chemstry Ch -1 at Coastline
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Created by:
DeepSeaBee Plus on April 23, 2012
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31 terms
Terms | Definitions |
|---|---|
 SI | International System of Units |
| Purpose fo the SI | Provides uniformity for units used in science. |
| Meter | Length, 39.4 inches just longer than a yard |
| Centimeter | 1/100 of a meter or 2.54 cm to an inch. |
| Liter | Volume, slightly larger than a quart or 1.06 quart. |
| Gram | Weight, 1000g = 1kg = 2.20 lb |
| Celcius | Temperature, 0c = 32f = freezing; 100c = 212f = boiling. |
| Kelvin | Lowest obtainable temperature is 0K, Kelvin (K) |
| Length | metric = meter (m) SI= meter (m) |
| Volume | metric = liter (L) SI = Cubic Meter (m^3) |
| Time | seconds (s) |
| Scientific Notation | a method of writing very large or very small numbers by using powers of 10 |
| Two parts of scientific notation: | Coefficient and power of ten. |
| Measured numbers | Numbers obtained from a measurement that have some degree of uncertainty or error. |
| SIgnificant figures | The digits in a measured number that include all certain digits and the first uncertain digit. |
| Exact numbers | numbers that have no uncertainty; numbers from defined relationships, counting numbers, and numbers that are part of reduced simple fractions. |
| tera | T 1,000,000,000,000 or 10^12 |
| giga | G 1,000,000,000 or 10^9 |
| mega | M 1,000,000 or 10^6 note the use of upper case"M" for mega while a lower case "m" for mili |
| kilo | k 1,000 or 10^3 |
| deci | d 0.1 or 10^-1 |
| centi | c 0.01 or 10^-2 |
| mili | m 0.001 or 10^-3 note the lower case "m" for mili where as mega uses upper case "M" |
| micro | μ 0.000001 or 10^-6 |
| nano | n 0.000000001 or 10^-9 |
| pico | p 0.000000000001or 10^-12 |
| Conversion factor | Every equality can be written in the form of a fraction, in which one of the quantities is the numerator and teh other is the denominator. |
| Density | mass/volume |
| Density of solids and liquid is generaly expressed as: | grams per cubic centimeter, or g/cm^3 |
| Density of gases is usually expressed as: | grams per liter, or g/L |
| Specific gravity | ratio of a mineral's weight compared with the weight of an equal volume of water. |
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