Working Scientifically Skills

Question 1

What is an Independant variable? and what axis is it always found on when graphs are shown?

Answer 1

The thing that i can change and it is always found on the x axis

Question 2

What is a dependent variable ?and where is it usually on a graph ?

Answer 2

Its the thing you measure and its usually on the y axis

Question 3

What is the control variable ?

Answer 3

The thing you keep the same

Question 4

What is a way of describing the Independent and dependant variables relationship

Answer 4

The Independant variable is the variable that is changed and the dependant the affect

Question 5

What are the three scientific errors

Answer 5

Random errors
Systematic errors
Zero errors

Question 6

Can random errors be corrected and how can they be minimised?

Answer 6

No and they can be minimised by more repeats and calculating the mean

Question 7

State Examples of a random errors and describe them !

Answer 7

Parallax errors when you read a value not level with the meniscus

And errors caused by reaction times

Question 8

What do systematic errors always cause the reading to be ?

Answer 8

Either larger or smaller than the true value but never both

Question 9

What causes a systematic error?(3causes)

Answer 9

They are caused by imperfectly calibrated instruments

Imperfect observation methods

The enviroment

Question 10

How to overcome systematic errors ?

Answer 10

The results must be repeated with different apparatus/tools or a different technique

Question 11

How to overcome systematic errors ?

Answer 11

The results must be repeated with different apparatus/tools or a different technique

Question 12

What is an example of a systematic error?

Answer 12

-A leaking gas syringe

Question 13

What is a zero error caused by and what affect does this have on the reading ?

Answer 13

When a measuring device is not at zero before a measurement is taken and it causes the reading to have the same numerical error

Question 14

How can a zero error be corrected ?

Answer 14

By subtracting the value of zero error from each result

Or
By recalibrating the measuring device an repeating the measurements

Question 15

State an example of a zero error!

Answer 15

An ammeter not returning to zero when no current is flowing in the circuit

Question 16

Why do we display data

Answer 16

To make predictions

Question 17

Why do we keep the controll variable

Answer 17

To make it a fair test

Question 18

When is a line graph used

Answer 18

When the dependant and Independant are continuous

Question 19

Name 3 types of data

Answer 19

Continuous
Discrete
Categoric

Question 20

Define continuous data

Answer 20

Data that can take any value within range such as eg.time ,height,temperature and weight and this data can have decimal points

Question 21

Define discrete data

Answer 21

When you count things that take specific and distinct data only having whole numbers

Question 22

Name an example of descrete data

Answer 22

Number of students in a class
Number of cars
Ect

Question 23

Define categoric data

Answer 23

When you classify data into categories or data in words

Question 24

Name an example of categoric data (2)
(There are many others )

Answer 24

Colour
How objects feel smooth or rough

Question 25

What are intervals on a graph

Answer 25

They represent Segments or ranges along the x and y axis