Paper 1 · People, Development and Environment
Which of the following statements are true? 1. Three seismograph stations are needed to locate the epicentre of an earthquake. 2. Ninety percent of earthquakes occur at plate boundaries. 3. Body waves consist of P and S waves. 4. In general, the most destructive earthquake waves are the surface waves.
- Three seismograph stations are needed to locate the epicentre
- Ninety percent of earthquakes occur at plate boundaries
- Body waves consist of P and S waves
- The most destructive earthquake waves are the surface waves
A2, 3 and 4
B1, 2 and 3
C1, 2, 3 and 4 ✓ Correct
D1, 3 and 4
Correct answer: (C) 1, 2, 3 and 4 — All four statements are true, so that is the answer.
Explanation
★All four statements are true, so that is the answer.
★Three seismograph stations are needed to fix an epicentre.
★About ninety percent of earthquakes occur at plate boundaries.
★Body waves are made up of P waves and S waves.
★Surface waves are generally the most destructive.
★So statements 1, 2, 3 and 4 are all true.
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