Part a: Describe an experiment to investigate drainage rate and water retention capacity of different soil types (K, L, M). Explain the results. Part b: Explain the meaning of hazard symbols I, II, II

a)

• (i) The aim of the experiment is to investigate the drainage rate and water retention capacity of different soil types (K, L, and M).

• (ii) Soil L has the highest rate of drainage because it allowed the largest volume of water to pass through into the measuring cylinder.

• (iii) Soil K has the highest water retention capacity because it allowed the least amount of water to drain through, meaning it retained the most water.

• (iv) Soil L is most likely to lose water and dry faster after rainfall because it has the highest drainage rate and therefore retains the least water.

• (v) Soil K is most likely to be waterlogged after rainfall because it has the lowest drainage rate and highest water retention, causing water to accumulate.

• (vi) Soil M would be suitable for maize cultivation. It shows an intermediate drainage rate and water retention, providing a balance of moisture and aeration necessary for healthy crop growth.

b)

• (i)

  • I: Toxic or Poisonous
  • II: Irritant or Harmful
  • III: Flammable
  • IV: No firearms or No weapons

• (ii)

  • I (Toxic): Cyanide
  • II (Irritant/Harmful): Bleach
  • III (Flammable): Petrol

• (iii)

  • II (Irritant/Harmful): Laboratories
  • IV (No firearms): Airports

• (iv) The symbols displayed on chemical containers are I, II, and III.