sir

SIR

• S – Describes asexual reproduction as reproduction where there is no fusion of gametes, and offspring are genetically identical to parents– Well presented information

• I – Needs to define asexual reproduction– Need to put into own words

What is this? Why is it this shape?

What does it do?

ObjectiveBy the end of this lesson I will be able to…

OutcomeIn order to meet the objective…

Explain the way plants disperse seeds and the adaptations necessary

All pupilList and explain the various methods of seed dispersal (C grade)

Most PupilsWrite a hypothesis and collect reliable data of seed length and time to fall(B grade)

Some Pupils Plot an accurate graph of results with range of scatter shown (A/A*grade)

What we are learning How we are learning

Seed Dispersal 1

Seed dispersal

Seeds are dispersed in many different ways:

• Wind• Explosion• Water• Animals• Birds• Scatter








Seed Dispersal 1

Experiment

• You will design an investigation into seed wing length and time to fall. Decide on factors to be controlled. Collect results in rough at first

• What is the independent variable? (thing you are changing)

• What is the dependent variable? (thing you are measuring)

• What are the control variables? (things that stay the same)

Hypothesis

• What do you predict will happen?

• As seed length increases by _____, time to fall will ______ by _____

Wing length (mm) Time to fall (s) average

20-29.9 75, 86, 65, 88, 77

30-39.9

40-49.9

50-59.9








Seed Dispersal 1

• Checklist: Revealing patterns in data E (out of 8 marks)• Display your results in a simple table (1 mark)• Draw a bar chart/ graph using given axes and scales by your teacher

(2 marks)• Record and draw a line graph for your results with the help of you

teacher (3 marks)• Draw a line graph yourself that has some errors in scales and plotting

of results (4 marks)• Correctly draw a line graph with correctly drawn scales and plotting

of results (5 marks)• Draw a correct and appropriate line of best fit (6 marks)• Draw range bars or displaying data in scatter graphs to indicate

spread of data (7 marks)• Correctly draw ranges bars and scatter graphs (8 marks)



Analyse your results and discuss the hypothesis

All pupilsExplain the extent to which the hypothesis can account for patterns in data (refer to figures). Use scientific knowledge to conclude if the hypothesis has been supported (Grade B)

Most PupilsSuggest how the hypothesis should be modified to account for the data more completely. Suggest extra data needed.(A)

Some PupilsGive a detailed account of what extra data should be collected to increase confidence in the hypothesis. (Grade A*)

What we are learning

Seed dispersal Analysis



Evaluate accuracy and repeatability of results

All pupilsUse the general pattern of results or degree of scatter between repeats as a basis for assessing accuracy and repeatability(B grade)

Most PupilsExplain your judgement of repeatability (reliability) and accuracy with reference to your graph and range bars. Explain outliers(A grade)

Some PupilsConsider critically the repeatability of the results, accounting for outliers with reference to equipment or techniques (A*)


Evaluation

sir

Documents

accurate graph of results

reliable data of seed

seed wing length

line graph

seed dispersalseeds

range of scatter

learningseed dispersal

data e