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Lesson 2: Model Science
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Gravity
Terms in this set (26)
direct experimentation with communities is impossible
Environmental scientists use statistics frequently because _________.
conceptual model
a verbal or graphical explanation for how a system works or is organized
control group
in an experiment, a group that serves as a standard of comparison with another group to which the control group is identical except for one factor
core
the central part of the earth below the mantle; also the center of the sun
correlation
the linear dependence between two variables
data
any pieces of information acquired through observation or experimentation
distribution
the relative arrangement of the members of a statistical population; usually shown in a graph
experiment
a procedure that is carried out under controlled conditions to discover, demonstrate, or test a fact, theory, or general truth
experimental group
in an experiment, a group that is identical to a control group except for one factor and that is compared with the control group
hypothesis
a testable idea or explanation that leads to scientific investigation
mathematical model
one or more equations that represent the way a system or process works
mean
the number obtained by adding up the data for a given characteristic and dividing this sum by the number of individuals
model
a pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept/
observations
the process of obtaining information by using the senses; the information obtained by using the sense
prediction
a statement made in advance that expresses the results that will be obtained from testing a hypothesis if the hypothesis is supported; the expected outcome if a hypothesis is accurate
probability
the likelihood that a possible future event will occur in any given instance of the event; the mathematical ratio of the number of times one outcome of any event is likely to occur to the number of possible outcomes of the event
risk
the probability of an unwanted outcome
sample
the group of individuals or events selected to represent a statistical population
statistics
the collection and classification of data that are in the form of numbers
variable
a factor that changes in an experiment in order to test a hypothesis
experiment
A procedure that is carried out under controlled conditions to discover, demonstrate, or test a fact, theory, or general truth is a(n) _____.
the more likely its mean represents the larger group accurately
The more samples you take of a population, __________.
The accuracy increases.
What usually happens to the accuracy of an estimate of population size as the number of fish caught increases?
that the settlements failed due to the drought
The Roanoke settlement and the first Virginia colony correlated with extremely dry conditions. This fact led investigators to conclude __________.
most of the deaths centered around one pump on Broad Street
Showing imagination and creativity, John Snow drew out a map which showed the location of cholera deaths in 1854. His map clearly illustrated that __________.
disproved
When a scientist creates a hypothesis, it is important that it can be __________.
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