8th Science Chapter 2

Question 1

The experimental treatment differs from the control treatment only in the ______ being studied.

Accepted Answer

variable

Question 2

Any pieces of information acquired through observation or experimentation.

Accepted Answer

data

Question 3

The collection and classification of data that are in the form of numbers

Accepted Answer

statistics

Question 4

A conceptual model represents a way of thinking about

Accepted Answer

relationships

Question 5

Scientists form ___________ hypothesis to answer questions.

Accepted Answer

testable

Question 6

A principal or standard that an individual considers to be important.

Accepted Answer

value

Question 7

A procedure that is carried out under controlled conditions to discover or test a theory.

Accepted Answer

experiment

Question 8

The group of individuals or events selected to represent a statistical population.

Accepted Answer

sample

Question 9

Reading scientific reports is an example of

Accepted Answer

gathering information

Question 10

The number obtained by adding up the data and dividing by the number of individuals.

Accepted Answer

mean

Question 11

The probability of an unwanted outcome.

Accepted Answer

risk

Question 12

One or more equations that represent the way a system or process works.

Accepted Answer

mathematical model

Question 13

If the results of your experiment do not support your hypothesis, you should

Accepted Answer

publish your results anyway

Question 14

A factor that changes in an experiment in order to test a hypothesis.

Accepted Answer

variable

Question 15

Scientists form _______ hypothesis to answer questions.

Accepted Answer

testable

Question 16

A testable idea or explanation that leads to scientific investigation.

Accepted Answer

hypothesis

Question 17

Models used by scientists include

Accepted Answer

Both (A) and (C)

Question 18

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

Accepted Answer

decision making model

Question 19

The process of obtaining information by using the senses.

Accepted Answer

observation

Question 20

Scientists ______ experiments to make sure the results are meaningful.

Accepted Answer

repeat

Question 21

Risk is the _________ of negative outcome.

Accepted Answer

probability

Question 22

The linear dependence between two variables.

Accepted Answer

correlation

Question 23

To fully understand a complex environmental issue, you may need to consider

Accepted Answer

all of the above

Question 24

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

Accepted Answer

conceptual model

Question 25

The relative arrangement of the members of a statistical population.

Accepted Answer

distribution

8th Science Chapter 2

Questions 25

8th Science Chapter 2

Questions 25