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17. tropisms in plants

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MYP Biology 10 Lab
B and C Tropisms in plants
After being divided into groups of 3, individually design an investigation into an area of plant
growth using Criteria B. Once your designs are complete and submitted to Managebac, you
will then select one design from your group of 3 to carry out. You will work as a group to set
up, monitor, and measure the results of the investigation. You will then INDIVIDUALLY
complete Criteria C, based on the data collected as a group and submit to Managebac.
Investigation

Design a controlled investigation into an area of plant growth as controlled by
auxins.
E.g. you could try to find out if apples ripen faster if stored with bananas.
For ‘storage’ you could place an unripe apple & a banana into a plastic ‘Ziploc’ bag, and then
seal it. To compare ripeness of apples, you could cut them in half, and then stain with iodine
solution.
The more blue/black colour, the more starch converted into sugar.
OR look at effect of light, gravity, water etc.
You must include:




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The Research question you are investigating
Do apples ripen faster if...?
Select appropriate variable (IV,DV, controlled variables)
Hypothesis
Your prediction of the results that links the independent to the dependent variable
and gives an explanation
If we store unripe apples.... then... because...
Materials
Method (step by step, including labelled diagram of set-up as appropriate)
Data collection
How are you going to measure, record and process your data.
Your completed report will be submitted to Managbac.
Next lesson you will set up your groups selected investigation and begin collecting
data. You will process the data, draw conclusion and write a full evaluation of you
experiment.
REMEMBER TO FOLLOW THE RUBRICS FOR CRITERIA B AMD C OVERLEAF
MYP Biology 10 Lab
Criteria B:
7-8
The student is able to:
 explain a problem or question
to be tested by a scientific
investigation
I have:
 given a detailed account of a problem, using the
scientific facts and sources, how it is related to the
topic, including the all variables.

formulated a testable hypothesis providing details
about the variables using words like ‘increase,
decrease, no change’ and supported it clearly using
correct scientific reasoning using ‘because’

formulate and explain a
testable hypothesis using
correct scientific reasoning

explain how to manipulate the
variables, and explain how
sufficient, relevant data will be
collected

given a detailed account of how to manipulate,
control and measure IV, DV and all controlled
variables and collect sufficient relevant data

design a logical, complete safe
method in which he or she
selects appropriate materials
and equipment

designed a safe, complete and logical method that is
easy to follow and contains every material used and
include all quantities.
Criteria C:
7-8
The student is able to:
 correctly collect, organize,
transform and present data in
numerical and/or visual forms
I have:
 correctly organized data using tables including
correct titles, headers and units; data has been
processed showing worked examples and displayed
appropriately using correct labels and units

accurately interpret data and
explain results using correct
scientific reasoning

correctly used knowledge and understanding of
science to recognise patterns, draw conclusions and
correctly given an account of how and why the
variables are related

evaluate the validity of a
hypothesis based on the
outcome of a scientific
investigation

evaluated whether the data supports the hypothesis
based on the data collected considering many
possibilities and used scientific reasons and sources
to explain

evaluate the validity of the
method based on the outcome
of a scientific investigation

evaluated the method considering the strengths,
limitations and the reliability and addressed the
significance

explain improvements or
extensions to the method that
would benefit the scientific
investigation

provided a detailed account to explain improvements
to specific limitations and further work that are
realistic and based on scientific reasoning and
research
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