Starter quiz
- True or false? Seeds are the offspring produced from sexual reproduction in flowering plants.
- True ✓
- False
What are the three main parts of a seed?- food store ✓
- tough outer coating ✓
- gamete
- tough inner coating
- embryo ✓
-
- Calculate the mean of the following numbers: 10, 5 and 15.
- '10' ✓
- What is a factor that might affect the process that is being investigated?
- 'variable' ✓
- Match the type of variable to its description.
- independent⇔variables that are chosen to be changed ✓
- dependent⇔variables that are measured ✓
- control⇔variables that are kept the same ✓
- What is the most likely dispersal mechanism for sycamore seeds?
- explosion
- wind ✓
- animals
- water
-
Exit quiz
- What is the mechanism by which seeds are transported away from the parent plant called?
- 'seed dispersal' ✓
Match the seed to its dispersal mechanism.- wind ✓
- water
- animal
- explosion
-
- Results that don't fit the pattern are called ______ results.
- 'anomalous' ✓
Calculate the mean of the following results.- '25' ✓
Match the variables to their description for an investigation into how wing width affects the distance a seed travels.- independent variable⇔width of wings ✓
- dependent variable⇔distance the seed travels ✓
- control variable⇔length of wings ✓
- Why do scientists take repeated measurements?
- to ensure the equipment is working
- to get the same result each time
- to identify anomalous results ✓
- to make it fair
- to calculate a mean ✓
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Worksheet
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Video
Lesson Details
Key learning points
- Seeds are dispersed by different mechanisms to increase the chance of survival.
- Seeds are adapted to match the mechanism for dispersal; e.g. wind dispersed are light with a large surface area.
- Variables are factors that affect the process being investigated, the dependant variable is distance the seed travels.
- Practical investigation of how far model seeds disperse with changes to their template.
- Repeat measurements for each value to identify anomalous results and calculate a mean.
Common misconception
That means are always divide by three.
Show examples where the number of repeats varies.
Keywords
Seed dispersal - Mechanism by which seeds are transported away from the parent plant.
Adaptations - Features of living organisms that help them survive in their environment.
Variable - Anything that can change or be changed in an investigation.
Repeats - Measurements of the same value allows anomalous results to be identified.
Mean - A measure of average where all values are added together and divided by the number of repeat measurements that have been taken.
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