
a defined unit in a system of measurement that is based on an object or event in the physical world and is independent of other units 


the amount of mass per unit volume 

What is the equation for density? 



a unit defined by a combination of base units 

What is a conversion factor? 

a ratio of equivalent values used to express the same quantity, always equals 1 and changes the units of a quantity without changing its value 

What is dimensional analysis? 

a systematic approach to problem solving that uses conversion factors to move from one unit to another 


the difference between an experimental value and an accepted value 




the SI base unit of temperaturenot measured in degrees 

What is the SI base unit for mass? 


What is the metric unit of volume equal to one cubic decimeter? 


What is the SI base unit for length? 



the ratio of an error to an accepted value 

What is the SI base unit for time? 


What is scientific notation? 

a method used to express any number as a number between 1 and 10 multiplied by 10 raised to a power(exponent) an example would be 1.24 x 10^{12} 

What is a significant figure? 

the number of all known digits reported in measurements plus one estimated digit 

What is the equation for percent error? 


How do you convert Celsius to Kelvin? 

K=273+temperature in Celsius 


you divide the dependent y variable by the independent x variablerise over run 

What is the difference between accuracy and precision? 

Accuracy refers to how close a measured value is to an accepted value where precision is how close a series of measurements are to one another. 

When multiplying scientific notations what do you do? 

multiply the coefficients and add the exponents 

What do you do in the division of numbers in scientific notation? 

divide coefficients and subtract the exponents 

How many significant digits does 12.3 have? Give the rule explaining why. 

3; NonZero numbers are always significant 

How many significant digits does 1098.3 have? Give the rule why. 

5; because Zeros between nonzero numbers are always significant 

How many significant digits does 12.0 have? Give the rule why. 

3 because All final zeros to the right of the decimal are significant 

How many significant digits does 0.0023 have? give the rule why. 

2; In a decimal number, zeros that come before the significant number are not significant 

How many significant digits does 23,000 have? Give the rule why. 

2; trailing zeros without a decimal are not significant, however if the number was 23,000.0 the zeros would be significant 

What determines the number of significant digits when adding, subtracting, multiplying, or dividing? 

the number with the lowest number of significant digits 

How do you round 5’s when there are zeros after them or no digits after? 

Round down if the digit before the 5 is even and round up if the digit before the 5 is odd 

What are the 3 major types of graphs? 

Circle graph, Line Graph, and Bar Graph 

What graph is useful for showing parts of a whole? 


What graph is useful in showing how quantities vary across categories? 


What graph is used to show the relationship between the independent variable and the dependent variable? 


What is interpolation when interpreting a graph? 

it is any data points that are included on the line between the recorded points of data 


extending a line beyond the plotted points in order to estimate futher data 

What is the base unit for (a)temperature, (b)length, (c) mass, (d)time? 

a. Kelvin(K); b.meters(m); c. kilogram(kg); and d.seconds(s) 
