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bias
when the scientist’s expectations change how the results are analyzed or the conclusion is drawn
constant
a factor that does not change
control
the standard by which the test results can be compared
dependant variable
the value changes according to the changes in the other variables
experiment
tests the effect of one thing on another using a control
hypothesis
a possible explanation of one thing on another using what you observe
independent variable
the variable that is changed to see how it will effect the dependent variable
model
represents an idea, event, or object to help people better understand it
scientific law
a statement about what happens in nature and seems to be true all the time
scientific methods
the pattern of investigation procedures
theory
an explanation of things based on knowledge gained from many observations and investigations
variable
a quantity that can have more than a single value
density
the mass per unit volume of a material
mass
a measurement of the quantity of matter in an object
matter
anything that takes up space and has mass
SI
improved version of the metric system (International System of Units)
standard
an exact quantity that people agree to use to compare measurements
volume
the amount of space occupied by an object
graph
a visual display of information or data
society
a group of people that share similar values or beliefs
technology
the application of scientific knowledge to benefit people
weight
which one takes gravity into account? (mass or weight)
state the problem
gather information
form a hypothesis
test hypothesis (experiment)
analyze data
draw conclusions
what are the steps of the scientific method?
life
physical
earth
what are the types of sciences?
it has to be able to be tested and verified (it cannot answer questions about emotions and values)
what are the limitations to science?
be able to observe it
be able to test it
be able to repeat/verify it
what factors must something have to be studied scientifically?
kilograms
what is the SI unit for mass?
seconds
what is the SI unit for time?
Kelvin
what is the SI unit for temp?
meters
what is the SI unit for length
meters
how would you measure the height of the ceiling in your room?
millimeters
how would you measure the thickness of your fingernail
L・W・H = LWH cm3
how do you find the volume of an object?
mass/volume
how do you find the density of an object?