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# Chapter 2: Tools of Environmental Science

Across
The number obtained by adding the data for a characteristic and dividing this sum by the number of individuals.
A piece of information we gather using our senses.
Consists of a series of steps that scientists worldwide use to identify and answer questions.
The probability of an unwanted outcome.
The gain or loss of money or jobs.
A model that includes one or more equations that represent the way a system or process works.
A group of similar things that a scientist is interested in learning about.
The number of objects or events sampled.
The relative arrangement of the members of a statistical population.
Principles or standards that we consider important.
The chance something will happen.
Useful for comparing the data for several things in one graph.
A logical statement about what will happen if the hypothesis is correct.
The protection of natural resources.
Down
A pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept.
A procedure designed to test a hypothesis under controlled conditions.
A model that explains how a system works or is organized, often using a flow-chart.
The pieces of information that a scientist gathers during an experiment, which is often in numeric form.
A conceptual model that provides a systematic process for making decisions.
A group of individuals or events selected to represent a statistical population.
In this group of the experiment the single variable being tested is present.
Occurs when the data is grouped symmetrically around the mean.
Collection and classification of data that are in the form of numbers.
Three-dimensional model that you can touch.
A single factor that changes in an experiment in order to test a hypothesis.