Ch. 2 Key Terms

Question 1

observation

Answer 1

a piece of info u gather using our senses

Question 2

hypothesis

Answer 2

a testable idea or explanation that leads to scientific investigation

Question 3

prediction

Answer 3

a logical statement about what will happen

Question 4

experiment

Answer 4

a procedure designed to test a hypothesis under controlled conditions

Question 5

variable

Answer 5

the factor of interest, which, in our example would be the level of phosphate

Question 6

experimental group

Answer 6

receives the experimental treatment

Question 7

control group

Answer 7

does not receive the experimental treatment

Question 8

data

Answer 8

the info scientists gather

Question 9

correlation

Answer 9

when an answer is imposable or unethical you use…

Question 10

statistics

Answer 10

the collection and classification of data

Question 11

mean

Answer 11

the number obtained by adding the data for characteristics

Question 12

distribution

Answer 12

the relative arrangement of numbers

Question 13

probability

Answer 13

the chance something will happen

Question 14

sample

Answer 14

a group of individuals or events selected to represent the population

Question 15

risk

Answer 15

the probability of an unwanted outcome

Question 16

model

Answer 16

representations of objects or systems

Question 17

conceptual model

Answer 17

is verbal or graphical explanation

Question 18

mathematical model

Answer 18

one or more questions that represents the way a system process works.

Question 19

value

Answer 19

principles or standards we consider important

Question 20

decision-making model

Answer 20

a conceptual model that provides a systematic process for making decisions