Chapter 2: Data in Science
Terms in this set (42)
a measure of the amount of matter in an object
a measure of the size of an object or region in three-dimensional space
the ratio of the mass of a substance to the volume of the substance.
a measure of how hot (or cold) something is; specifically, a measure of the average kinetic energy of the particles in an-object
a pattern, plan, representation, o description design to show the structure or workings of an object, system, or concept
a system of ideas that explains many related observations and is supported by a large amount of scientific investigation is called a(n) ______________
a descriptive statement or equation that reliably predicts events under certain conditions is called a(n) _________
a factor that is deliberately changed in an experiment is called a(n)________________ variable.
the factor that can change as a result of manipulation and is measured is called a(n) ___________ variable.
one of two or more reference lines in that mark the borders of a graph
the number obtained by adding up the data for a given characteristic and dividing this sum by the number of individuals
the value of the middle item when data are arranged in order by size.
the most frequently occurring value in a data set
a measure of the slant line; the ratio of rise over run
What is a tool?
anything that helps you do a task
What are tools used for?
to take accurate measurements
to collect data
to evaluate and analyze data
the basic SI unit of mass
a unit used to express liquid volume
the basic SI unit of length
a unit used to express the volume of larger solid objects
A cubic meter is equal to 1,000 ____________
How do you calculate density?
used to explain why the universe seems to be expanding
used to help understand how a real shuttle blasts off into space
used to predict the weather
What type of model tries to put many ideas together to explain or summarize something?
How are models used by scientist
models can make a molecule easier to visualize
models can be used to summarize new info.
models are used to communicate difficult info.
What does law tell you, and what does a law not tell you?
law tells you what happens, not why or how it happens.
Graphs make it easy to do what 2 things?
identify trends and make predictions
found by subtracting the smallest value of a variable from the largest value of the same variable
is the size used for each box or grid mark on a graph
line of best fit
shows how data differ from the pattern; a smooth line drawn to include some but not all of the data points
plotted by putting a dot on the graph for a pair of data in the table
the pattern of data on a graph
a graph in which the relationship between variables cannot be shown with a straight line
a graph in which the relationship between the independent variable and dependent variable can be shown
A relationship in which one variable increases while the other variable decreases.
Why is mathematics often called the "language of science"?
because it lets scientists share their findings in a language everyone understands
What is true of data that is accepted or supported by other scientist?
It is reproducible
What does the rise represent?
a vertical change (y)
What does the run represent?
a horizontal change (x)
How is the slope of a straight line calculated?
rise over run
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