National 5 Biology experiment questions

Plan, process and judge an experiment you have never seen.

Skills	Planning, variables, controls, reliability, validity
Data	Tables, graphs, averages, percentages and ratios
Techniques	Potometer, respirometer, quadrat, pitfall trap, transect

What the questions ask for

The variable changed, the one measured, and the ones kept the same.
How repeats make results more reliable, and what a control shows.
A conclusion that answers the aim, and one improvement with a reason.

Try 2 questions

Question 1

Types of lichen found at five distances from a town centre.
Distance from town centre / km	Types of lichen found
0	crusty
2	crusty
4	crusty, leafy
6	crusty, leafy
8	crusty, leafy, bushy

Lichens are indicator species of air pollution. A pupil records the types of lichen growing on trees at different distances from the centre of a town, as the table shows. Which conclusion do the results support?

Question 2

The graph shows the rate of photosynthesis of a plant at 20 °C. For the plant in 0.04% carbon dioxide, which factor limits the rate at a light intensity of 8 units?

Next step

Take the free test Start the sampling lesson

Questions people ask

Is this the same as the assignment?

No. The assignment is your own write-up in school. The paper asks about experiments described to you.