science assessment practical term 3

Question 1

Independent variable

Answer 1

is the deliberately changed variable in the experiment

Question 2

which axis does the independant variable lie on

Answer 2

x axis (horizontal)

Question 3

dependant variable

Answer 3

is the variable being measured and are often changed by the independant variable

Question 4

which axis does the dependant variable lie on

Answer 4

y axis (vertical)

Question 5

controlled variable

Answer 5

variables that remain constant throughout the experiment

Question 6

how can you tell what the most significant controlled variable is

Answer 6

the controlled variable that effects the dependant variable the most

Question 7

what is accuracy?

Answer 7

how close the results are to it’s true value

Question 8

what is the reliability of a experiment?

Answer 8

is whether the results from your experiment are consistently similar with no outliers, when the experiment is repeated at least 3 timex

Question 9

what is the validity of a experiment?

Answer 9

if it is a fair text and there is no errors within the variable

Question 10

fair test

Answer 10

a fair test is determined if all the controlled variables stay constant throughout the experiment and if only the independant variable is changed. also if the dependant variable is measured correctly with no bias.

Question 11

it is non linear if

Answer 11

it is the curve of best fit or the line of best fit is not straight

Question 12

it is linear if

Answer 12

the line of best fit is straight

Question 13

things that all graphs must have

Answer 13

• must be done with pencil and ruler
• scale that is approximate and with evenly spaced increment
• label the axes variables (unit)
• write the title of the graph on top

Question 14

hypothesis sample

Answer 14

if IV then DV

Question 15

what is an aim

Answer 15

the statement of the experiment’s purpose

Question 16

what is a risk assessment

Answer 16

table of identified risk, which identified the assessed risks and how to control them.

Question 17

aim sample

Answer 17

to VERB the effect of IV on DV

Question 18

it is positive if

Answer 18

when the value of the iv increases the dv increases

Question 19

method

Answer 19

the procedure of the experiment in steps in a chronological order

Question 20

things methods must have

Answer 20

1. must be numbered steps
2. in past tense
3. start with verb
4. the method must be repeatable
5. mentions iv,dv and cv

Question 21

conclusion

Answer 21

summary of the aim and results of the experiment

Question 22

things conclusion must have

Answer 22

• state whether or not the results supported or refuted your hypothesis
• use timeless present
• no personal pronouns use general terms

Question 23

testable question samples

Answer 23

• how does IV affect DV
• what happens to DV if IV

Question 24

discrete data

Answer 24

stand alone data e.g colour and location

Question 25

Continuous data

Answer 25

data that has continuous values e.g time,length, mass

Question 26

how to scale axes

Answer 26

1. find the range for the variable - range = largest - smallest value 2. divide the range by the number of intervals - after dividing you many need to round up 3. use the rounded number to mark off the intervals along the axis - the interval must be the same amount each time

Question 27

it is negative if

Answer 27

when the value of the iv increases the dv decreases