Difference between revisions of "GCSE Biology Required Practical: Measuring Population in a Habitat"
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Estimate the size of a [[population]] of a [[species]] within a [[habitat]] using [[Sampling (Biology)|sampling]] techniques and investigate a factor affecting [[population]] size. | Estimate the size of a [[population]] of a [[species]] within a [[habitat]] using [[Sampling (Biology)|sampling]] techniques and investigate a factor affecting [[population]] size. | ||
===Method=== | ===Method=== | ||
| − | + | Investigate the population of a species within a habitat using random sampling. | |
| − | + | #Gently throw a quadrat to fall in a random position on a field of grass. | |
| − | + | #Count the number of daisies within the quadrat. | |
| − | # | + | #Repeat steps 1 and 2 ten times. |
| + | #Calculate the mean number of daisies. | ||
| + | #Use the following equation to estimate the number of daisies in the field: | ||
| + | : Estimated population = <math>\tfrac{area sampled}{total area}</math> x number of daisies | ||
Revision as of 17:07, 22 November 2018
Key Stage 4
Meaning
Estimate the size of a population of a species within a habitat using sampling techniques and investigate a factor affecting population size.
Method
Investigate the population of a species within a habitat using random sampling.
- Gently throw a quadrat to fall in a random position on a field of grass.
- Count the number of daisies within the quadrat.
- Repeat steps 1 and 2 ten times.
- Calculate the mean number of daisies.
- Use the following equation to estimate the number of daisies in the field:
- Estimated population = \(\tfrac{area sampled}{total area}\) x number of daisies