Grade 7 · Science
Interpret a habitat sample practice
Use repeated samples and stated sampling limits to interpret habitat counts.
Opening your practice adventure…
Try a sample
A sample covers 5 m2 and contains 20 plants. What is the observed density in the sample?
- 4 plants per m2
- 25 plants per m2
- 100 plants per m2
- 0.25 plants per m2
See the answer & why
4 plants per m2
20 plants ÷ 5 m2 = 4 plants per m2.
A little hint: Keep sampled area, selection method and variation visible before generalizing to the whole habitat.
A teaching tip
Keep sampled area, selection method and variation visible before generalizing to the whole habitat.