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Chapter 2 The Tools of Science
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Gravity
6th grade Louisiana Interactive Science
Terms in this set (27)
metric system
a system of measure based on the number ten (10)
International System of Units (SI)
a system of units used by scientists to measure the properties of matter
mass
a measure of how much matter is in an object
weight
a measure of the force of gravity acting on an object.
volume
the amount of space that matter occupies
density
the measurement of how much mass of a substance is contained in a given volume
estimate
an approximation of a number based on reasonable assumptions
accuracy
how close a measurement is to the true or accepted value
precision
how close a group of measurements are to each other
significant figures
all the digits in a measurement that have been measured exactly, plus one digit whose value has been estimated
percent error
a calculation used to determine how accurate, or how close to the true value, an experimental value really is
mean
the numerical average of a set of data
median
the middle number in a set of data
mode
the number that appears most often in a list of numbers
range
the difference between the greatest value and the least value in a set of data.
anomalous data
data that do not fit with the rest of a data set
graph
a picture of information from a data table; shows the relationship between variables
linear graph
a line graph in which the data points yield a straight line
nonlinear graph
a line graph in which the data points do not fall along a straight line
model
a representation of a complex object or process, used to help people understand a concept that they cannot observe directly
system
1. a group of parts that work together as a whole
2. a group of related parts that work together to perform a function or produce a result
input
material, energy, or information that goes into a system
process
a sequence of actions in a system
output
material, energy, result, or product that comes out of a system
feedback
output that changes a system or allows the system to adjust itself
safety symbol
a sign used to alert you to possible sources of accidents in an investigation
field
an area outside of the laboratory
THIS SET IS OFTEN IN FOLDERS WITH...
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