Study Fig. 4, which shows plate boundaries and the spreading rate for those boundaries where sea floor spreading is occurring.

1. (a)(i)What is the fastest rate of sea floor spreading recorded on Fig. 4?[1]
2. (a)(ii)What is the type of plate boundary where sea floor spreading is taking place? Circle one correct answer below. This type of plate boundary is known as: conservative constructive destructive[1]
3. (a)(iii)Describe the distribution of the plate boundaries where sea floor spreading is occurring.[3]
4. (b)(i)Locations X and Y are labelled on Fig. 4. Identify the directions of plate movements at each of these locations. Circle the correct answer for X and Y. At X the plates are: converging diverging moving in the same direction At Y the plates are: converging diverging moving in the same direction[2]
5. (b)(ii)Circle one correct answer to complete the sentence. Earthquakes are likely to occur at: X Y both X and Y neither X or Y[1]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.