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# Mathematics

### Sig Figs, Metric Prefixes, Sci. Notation, Scientific Method

How are measurements accurate? Measurements are accurate by being close to the actual/real result or measurement.
How are measurements precise Measurements are precise by being close to one another. You can be precise but not accurate.
Describe a hypothesis A hypothesis is an if, then STATEMENT that describes what you believe will happen in an experiment.
What is qualitative data? Qualitative data is a description of results using words.
What is quantitative data? Quantitative data is a description of results using numbers.
How do scientific theories and hypotheses differ? Theories are as close to scientific law as possible. They have been tested repeatedly over many many years and proven to be correct. Hypotheses are for a particular experiment but can become theories after a long period of time.
What are metric prefixes? Give an example. Metric prefixes are attached to SI units to express the value of the unit. Ex. km = Kilo meters. Kilo stands for 1000 so 1km = 1,000 meters
What is scientific notation? Give an example. Scientific notation expresses values by their significant figures x10^n If n is a negative exponent the value is a decimal If n is a positive exponent the value is a number greater than 1. Ex. 4.5x10^2 = 450
What are Significant Figures? Give an example. Significant figures are all the relevant numbers expressed in a measurement. *Check your fact sheet! Ex. 65000 = 2 sig figs
What is an independent variable? The variable that you are testing. This is the one variable that you change per experiment.
What is a dependent variable? The variable that you are collecting. This is the measured variable.
What is a control variable? The variable that you are keeping constant through out the experiment. *NOT TO BE CONFUSED WITH CONTROL GROUP! A CONTROL GROUP IS A GROUP THAT IS KEPT CONSTANT AS A REFERENCE!
What are SI Units? What units do we commonly use in here? SI Units = International Systems of Units. Length = meter, m Mass = kilogram, kg Time = seconds, s Temperature = Kelvins, K Electric Current = Ampere, A
Created by: becook87