sci method

Question 1

accuracy

Answer 1

the extent to which the measurements are correct.

Question 2

blind experiment

Answer 2

an experiment where the subjects do not know whether they are receiving the test treatment or the placebo.

Question 3

classification

Answer 3

the grouping of organisms based on the similarity of their characteristics;
the placement of organisms into groups.

Question 4

conclusion

Answer 4

a summary of how the data supports or disproves the hypothesis.

Question 5

continuous data

Answer 5

quantitative data with an infinite number of possibilities

Question 6

control

Answer 6

a procedure carried out to give a comparison in an experiment

Question 7

controlled variable

Answer 7

a factor kept the same for both the control and the experimental groups in an experiment

Question 8

data

Answer 8

observations and measurements

the results of an experiment

Question 9

dependant variable

Answer 9

in an experiment, the fact that changes in response to changes made to the independent variable

Question 10

double blind experiment

Answer 10

an experiment where neither the subject nor the experimenter know who receives the test treatment or the placebo

Question 11

ethical behaviour

Answer 11

behaviour that conforms to a set of moral principles or values

Question 12

ethics

Answer 12

moral principles or values

Question 13

fair test

Answer 13

an experiment that only changes the independent variable and controls all other variables to test the hypothesis

Question 14

human error

Answer 14

an error due to the limitations of human ability

Question 15

hypothesis

Answer 15

a possible explanation to account for observations

plural ; hypotheses

Question 16

independent variable

Answer 16

in an experiment, the factor being investigated; the factor deliberately changed to determine its effect.

Question 17

interpretation

Answer 17

an attempt to explain the observation

Question 18

line graph

Answer 18

graph used to represent continuous data

Question 19

bar graph

Answer 19

a graph used to represent discrete data

Question 20

observation

Answer 20

the process of using the senses to acquire information

Question 21

placebo

Answer 21

a substance or procedure that has no therapeutic effect but is used as a control test

Question 22

placebo effect

Answer 22

a change or improvement in patients who are given a placebo treatment

Question 23

prediction

Answer 23

a guess at what might happen in the future

Question 24

qualitative data

Answer 24

observations that do not involve numbers or measurements

e.g. colour

Question 25

quantitative data

Answer 25

data expressed in numbers;

usually involved measurement.

Question 26

random error

Answer 26

an error in an experiment due to the limits to the precision of the measurements.

Question 27

reliability

Answer 27

the extent to which an experiment gives the same result each time it is performed.

Question 28

repetition

Answer 28

doing the same experiment many times

Question 29

scientific method

Answer 29

a process of conducting valid investigations

Question 30

systematic error

Answer 30

an error that occurs in an experiment because of the way the experiment was designed

Question 31

test

Answer 31

a method used to collect data to determine whether a hypothesis is supported or not

Question 32

theory

Answer 32

a hypothesis becomes a theory when there is overwhelming evidence in support of it

Question 33

validity

Answer 33

the extent to which an experiment tests what is supposed to test

Question 34

variable

Answer 34

any factor that may change during an experiment