Ch. 2 Key Terms

Question 1

Observation

Answer 1

Is a piece of information we gather using our senses, our sight, hearing, smell, and touch

Question 2

Hypothesis

Answer 2

Testable explanation for an observation

Question 3

Prediction

Answer 3

A logical statement about what will happen if the hypothesis is correct

Question 4

Experiment

Answer 4

A procedure designed to test a hypothesis under controlled conditions.

Question 5

Variable

Answer 5

Is the factor of interests, which, in our example, would be the level of phosphate in the water.

Question 6

Experimental Group

Answer 6

A group that receive the experimental treatment

Question 7

Control Group

Answer 7

The group that does not receive the experimental treatment

Question 8

Data

Answer 8

The info a scientist gathers in an experiment.

Question 9

Correlation

Answer 9

Reliable associations between two or more event.

Question 10

Statistics

Answer 10

Enviromental science provides a lot data that needs to be organized interpreted before they are use.

Question 11

Mean

Answer 11

Is the number obtained by adding up the data for a given characteristic and dividing this sum by the number of individuals.

Question 12

Distribution

Answer 12

Is the relative arrangement of the members of a statistical population.

Question 13

Probability

Answer 13

The chance that something will happen

Question 14

Sample

Answer 14

Is the group of individuals or events selected to represent the population

Question 15

Risk

Answer 15

Is the probability of an unwanted outcome

Question 16

Models

Answer 16

Representations of objects or systems

Question 17

Conceptual Model

Answer 17

Is a verbal or graphical explanation for how a system works or is organized.

Question 18

Mathematical Model

Answer 18

Is one or more equations that’s represents the way a system or process works.

Question 19

Value

Answer 19

Principals or standards we consider important.

Question 20

Decision-Making Model

Answer 20

A conceptual model that provides a synthetic process for making decisions.