Video 2 & Video 3 Terms (Combined)

Question	Answer
Metric System	- A system of scientific measurement and units used throughout the world
Base Unit	The fundamental unit to which prefixes can be added for each type of metric measurement.
Molecule	- A collection of atoms that are connected to one another.
Scientific Notation	- Used to express a large or small number -Large numbers should have positive exponents -Small numbers should have negative exponents - We move the decimal point to the left or right to get a number between 1 and 10.
Two Rules of Scientific Notation	- The "number part" must be equal or greater than 1, and it must be less than 10. - The "exponential part" is the number 10 raised to the number of positions we moved the decimal point.
Conversion Factors	- Fractions that express the same value in different units on the top and bottom.
Dimensional Analysis	A method that uses conversion factors to convert from one unit to next.
Celsius Temp. Scale	- Used to express temperature in the metric system
Melting Point of Water	- 0 degrees Celsius equivalent to -32 degrees Fahrenheit
Boiling Point of Water	- 100 degrees Celsius Equivalent to - 212 degrees Fahrenheit
Quality of Data	Precision & Accuracy
Precision	- Refers to the closeness of measured values to one another
Accuracy	- Refers to how close a number is to an accepted standard value

Resource summary

	Created by Jhennah Gill over 5 years ago