Working Scientifically

Question 1

What is the control variable?

Answer 1

The variable that must remian the same

Question 2

What is uncertainty?

Answer 2

Range/2

Question 3

What is the dependant variable?

Answer 3

The variabke you measure

Question 4

What is the independant variable?

Answer 4

The variable you change

Question 5

What is the resolution

Answer 5

The smallest non-zero reading

Question 6

What is the range?

Answer 6

The difference between the smallest and largest values

Question 7

How do we write the uncertainty?

Answer 7

The mean +- the uncertainty (range/2)

Question 8

When do you use a bar graph?

Answer 8

Categoric data (eye colour)

Question 9

Where do the independant and dependant variables go on a graph?

Answer 9

Independant: x axis
Dependant: y axis

Question 10

How do you draw uncertainty on a graph?

Answer 10

Using error bars around each plot on the graph

Question 11

What are the 2 types of error?

Answer 11

Random error- Caused by the person doing the experiment
Systematic error- Due to the system or apparatus being used

Question 12

What is the parallax error?

Answer 12

When someone’s eye level is not at the level of the liquid/ object when measuring

Question 13

What are the similarities and differences between solar cells and solar heating panels?

Answer 13

Similarities:
- Both use solar energy from the sun
- They can be used domestically
- Unreliable depending on weather conditions

Differences:
- Solar water heaters heat water whilst solar cells produces electricity
- Solar heating panels more efficient when using electricyt to heat water
- Solar cells can be connected to the National Grid

Question 14

What is ‘pico’ in standard form?

Answer 14

10^-12

Question 15

What is ‘nano’ in standard form?

Answer 15

10^-9

Question 16

What is ‘micro’ in standard form?

Answer 16

10^-6

Question 17

What is ‘milli’ in standard form?

Answer 17

10^-3

Question 18

What is ‘centi’ in standard form?

Answer 18

10^-2

Question 19

What is ‘deci’ in standard form?

Answer 19

10^-1

Question 20

What is kilo in standard form?

Answer 20

10^3

Question 21

What is ‘mega’ in standard form?

Answer 21

10^6

Question 22

What is ‘Giga’ in standard form?

Answer 22

10^9

Question 23

What is ‘tera’ in standard form?

Answer 23

10^12