paper 1 required practicles

Question 1

what is the dependant variable

Answer 1

the variable that you measure

Question 2

what is the indepentation variable

Answer 2

the variable that you change

Question 3

what is the control variable

Answer 3

the variable that you keep the same

Question 4

what does repeatable mean

Answer 4

if the same person does an experiment again using the same method and equipment, they’ll get similar results

Question 5

what does reproducible mean

Answer 5

if someone else does the experiment and a different method or piece of equipment is used the results will be similiar

Question 6

what does an investigation need to be to be deemed reliable

Answer 6

• repeatable
• reproducible

Question 7

what are random errors

Answer 7

unpredictable errors eg human error in measuring

Question 8

how can you reduce the effect of random errors

Answer 8

repeat readings and take a mean

Question 9

what is a systematic error

Answer 9

if a measurement is wrong by the same amount everytime

Question 10

what does the prefix giga mean the result is

Answer 10

x10^9

Question 11

what does the prefix mega mean the result is

Answer 11

x10^6

Question 12

what does the prefix kilo mean the result is

Answer 12

x10^3

Question 13

what does the prefix mili mean the result is

Answer 13

x10^-3

Question 14

what does the prefix micro mean the result is

Answer 14

x10^-6

Question 15

what does the prefix nano mean the result is

Answer 15

10^-9

Question 16

what is meant by the term resolution

Answer 16

the smallest inteval that the instrument can measure