Discarded plastics are one cause of pollution in oceans.
Macroplastics have diameters of 0.5 cm and above.
Microplastics have diameters below 0.5 cm.
Fig. 7.1 shows the mass of plastic pollution from macroplastics and microplastics in shallow coastal waters between 1950 and 2010.
(a(i))[1]
State the minimum size of a macroplastic, in millimetres.
(a(ii))[3]
Describe how the masses of macroplastics and microplastics change in Fig. 7.1.
(b)[2]
Describe two ways in which plastics can harm animals in the ocean.
(c)[1]
Besides plastics, state one other source of pollution in aquatic ecosystems.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “$5\text{ mm}$” …