Practical Accuracy And Extra Bits

Question 1

How can you improve accuracy when using a protractor

Answer 1

-ensure protractor base line is accurately lined up- zero is aligned
-measure at eye level
-ensure line is long enough to be measured
-lay flat

Question 2

How can you improve accuracy when using a ruler

Answer 2

-measure at eye level
-use on a flat surface
-make sure ruler is lined up and measure from 0

Question 3

How can you improve accuracy when using a stop clock

Answer 3

-reset to 0
-repeat 3 times then create an average
-time for as long as possible

Question 4

How can you improve accuracy when using a mass balance

Answer 4

-set to 0 using the TARE button
-use on a flat surface
-use away from drafts

Question 5

How can you improve accuracy when using a measuring cylinder

Answer 5

-use on a flat surface
-rad at meniscus

Question 6

How can you improve accuracy when using a ammeter/voltmeter

Answer 6

-wait until a constant reading
-repeat 3 times to find a mean

Question 7

How can you improve accuracy when using a thermometer

Answer 7

-stir mixture
-use a small scale thermometer
-read from eye level

Question 8

What type of data is used in a bar chart

Answer 8

Categoric e.g colour

Question 9

What data is used in a HR diagram

Answer 9

Ordered

Question 10

What types of variables are there

Answer 10

Independent- Alter/change
dependent- measure
Control- same (not equipment)

Question 11

What are the different types of data

Answer 11

-categoric e.g colour
-Ordered e.g size
-continuous e.g height
-discrete e.g shoe size