3
Please note –
To be used with your purchased revision guide and notes,
not instead of!
This is designed to help with your scientific practical skills,
you must know the theory behind each experiment.
1
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,Table of Contents
Assessment Practice 1.....................................................................................................................................................7
Statistical Tests..............................................................................................................................................................10
Standard deviation........................................................................................................................................................10
The null hypothesis.......................................................................................................................................................15
Chi-squared test............................................................................................................................................................15
Student’s t-test..............................................................................................................................................................21
Possible Experiments.....................................................................................................................................................29
Section B practice..........................................................................................................................................................30
Resources...................................................................................................................................................................... 32
2
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,Hypothesis
In the exam you will be asked to
write a hypothesis.
Level Mark Descriptor
Level
1-4 Limited attempt at a hypothesis is made
1
Level An explanation for the hypothesis is given which is partially
4-6
2 supported by scientific understanding
Level An explanation for the hypothesis is given which is supported
7-12
3/4 by scientific understanding
Write a hypothesis for the following
1. The effect of pH on enzyme activity.
2. The effect of surface area on the rate of diffusion
3. The effect of light on the growth of plants
4. Different fuels and the amount of energy they release
5. How changing the brightness of the bulb can affect the resistance of a light dependent
resistor.
Variables
3
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, Which variable is…
The one you change/investigate the effect of –
The one you measure –
Ones you keep the same –
On the graph below, label which variable goes where.
Y
X
Key terms
Define the following terms;
4
Document shared on www.docsity.com
Downloaded by: kingjames193 ()
Please note –
To be used with your purchased revision guide and notes,
not instead of!
This is designed to help with your scientific practical skills,
you must know the theory behind each experiment.
1
Document shared on www.docsity.com
Downloaded by: kingjames193 ()
,Table of Contents
Assessment Practice 1.....................................................................................................................................................7
Statistical Tests..............................................................................................................................................................10
Standard deviation........................................................................................................................................................10
The null hypothesis.......................................................................................................................................................15
Chi-squared test............................................................................................................................................................15
Student’s t-test..............................................................................................................................................................21
Possible Experiments.....................................................................................................................................................29
Section B practice..........................................................................................................................................................30
Resources...................................................................................................................................................................... 32
2
Document shared on www.docsity.com
Downloaded by: kingjames193 ()
,Hypothesis
In the exam you will be asked to
write a hypothesis.
Level Mark Descriptor
Level
1-4 Limited attempt at a hypothesis is made
1
Level An explanation for the hypothesis is given which is partially
4-6
2 supported by scientific understanding
Level An explanation for the hypothesis is given which is supported
7-12
3/4 by scientific understanding
Write a hypothesis for the following
1. The effect of pH on enzyme activity.
2. The effect of surface area on the rate of diffusion
3. The effect of light on the growth of plants
4. Different fuels and the amount of energy they release
5. How changing the brightness of the bulb can affect the resistance of a light dependent
resistor.
Variables
3
Document shared on www.docsity.com
Downloaded by: kingjames193 ()
, Which variable is…
The one you change/investigate the effect of –
The one you measure –
Ones you keep the same –
On the graph below, label which variable goes where.
Y
X
Key terms
Define the following terms;
4
Document shared on www.docsity.com
Downloaded by: kingjames193 ()
