chapter 1: the science endeavour

Question 1

science is the study of?

Answer 1

science is the study of natural phenomena in the world

Question 2

what is a scientist?

Answer 2

a scientists is a person who studies and practices science

Question 3

what is a qualitative data

Answer 3

qualitative data involves senses and usually describtive

Question 4

what is a qualitative data

Answer 4

qualitative data involves senses and measurements taken using instruments and are numerical

Question 5

science is

Answer 5

evidence-based

Question 6

evidence plays an important role in supporting theories and

Answer 6

hypothesis

Question 7

evidence collected is called

Answer 7

data

Question 8

and is obtained by

Answer 8

observing

Question 9

natural phenomena or

Answer 9

conducting experiments

Question 10

scientific knowledge is

Answer 10

subject to change

Question 11

the practices of science form the scientific mehthod - a ________________ way of finding answers based on observing the things around us

Answer 11

systematic

Question 12

a good scientific question is

Answer 12

one that is specific

Question 13

and can be investigated through observations or

Answer 13

experimentation

Question 14

a scientific question is accompanied by a hypothesis -

Answer 14

a proposed explanation for an observation

Question 15

factors that can alter the result of an experiment are called

Answer 15

variables

Question 16

variable changed by the experimenter

Answer 16

independent variable

Question 17

variable that is measured

Answer 17

dependent variable

Question 18

variable that is kept the same for a fair experiment

Answer 18

constant variable

Question 19

the hypothesis is a proposed explanation and must include

Answer 19

independent variable and the suggested effect on the dependent variable

Question 20

physical quantities are readings taken from instruments and they consist of the following:

Answer 20

a numerical value and unit

Question 21

SI unit for volume is

Answer 21

m3

Question 22

SI unit for mass is

Answer 22

kg

Question 23

SI unit for time is

Answer 23

s’

Question 24

SI unit for length is

Answer 24

m

Question 25

SI unit for temperature is

Answer 25

K

Question 26

measuring instrument for volume of liquid is

Answer 26

measuring cylinder burette pipette

Question 27

measuring instrument for volume of gas is

Answer 27

gas syringe

Question 28

measuring instrument for mass is

Answer 28

electronic balance scale balance

Question 29

measuring instrument for time is

Answer 29

stop watch

Question 30

measuring instrument for length is

Answer 30

metre rule measuring tape digital calipers

Question 31

measuring instrument for temperature is

Answer 31

digital themometer alchohal-in-gas themometer infra-red themometer thermocouple themometer

Question 32

the accuracy of a measurement refers to

Answer 32

how close the reading is to the true value

Question 33

accuracy is affected by

Answer 33

errors in measurement

Question 34

the precision of repeated measurements refers to

Answer 34

how close the readings are to each other

Question 35

systematic error causes measurements to be _______________ by the same amount

Answer 35

consistently off

Question 36

affects the __________ of measurements

Answer 36

accuracy

Question 37

zero error

Answer 37

instrument gives a non-zero reading when the measured quantity should be zero

Question 38

zero error is caused by

Answer 38

faulty instrument

Question 39

how to correct zero error

Answer 39

re- callibrate the instrument subtract the zero error from the final reading

Question 40

parallax error

Answer 40

marking on an instrument is read from the wrong position or angle

Question 41

parallax error is caused by

Answer 41

incorrecct use of the instrument by the experimenter

Question 42

how to correct parallax error

Answer 42

position the eye perpendicular to the mark on the scale

Question 43

a good scientist should (hint:p c o o t t)

Answer 43

show perseverance, be curious, be open-minded, be objective, be truthful, work as a teamd