Vocab 1.1

Question 1

observation

Answer 1

the act of noticing and describing events or processes in a careful, orderly way.

Question 2

inference

Answer 2

a logical interpretation based on what scientists already know.

Question 3

hypothesis

Answer 3

a tentative scientific explanation that can be tested by further observation or by experimentation

Question 4

controlled experiment

Answer 4

an experiment in which only one variable is changed and all others are unchanged, or controlled

Question 5

independent variable

Answer 5

the variable in an experiment which is deliberately changed

Question 6

dependent variable

Answer 6

the variable that is observed and that changes in response to the independent variable

Question 7

control group

Answer 7

the group in an experiment which is exposed to the same conditions as the experimental group except from the for changes in the independent variable

Question 8

data

Answer 8

the thing scientists observe in experiments which comes in two types. Quantitative data are numbers obtained by counting or measuring while qualitative data are descriptive and usually involve characteristics that can not usually be measured.

Question 9

theory

Answer 9

a well tested explanation for a range of phenomena