Question

which statement describes surface waves?
○ they arrive before s waves.
○ they travel faster than p waves.
○ they are produced by p and s waves
○ they travel deep below earths surface

Explanation:

• Analyze each option:
• Option 1: S waves arrive before surface waves, so this is incorrect.
• Option 2: P waves are the fastest seismic waves, surface waves travel slower than P and S waves? No, wait, surface waves are produced by the interaction of P and S waves at the surface. Wait, let's recall: P waves (primary) are fastest, then S waves (secondary), then surface waves (like Love and Rayleigh waves) which are produced by P and S waves when they reach the Earth's surface. Also, surface waves travel along the surface, not deep below. And their speed is less than P and S? Wait, no, actually, surface waves are slower than P and S? Wait, no, the correct fact: Surface waves are generated by the combination of P and S waves at the Earth's surface. Also, P waves are fastest, then S waves, then surface waves (but surface waves can cause more damage). Now let's check each option:
• "They arrive before S waves": No, P arrives first, then S, then surface waves. So wrong.
• "They travel faster than P waves": No, P waves are the fastest seismic waves. Wrong.
• "They are produced by P and S waves": Yes, when P and S waves reach the Earth's surface, they interact to produce surface waves (Love and Rayleigh waves).
• "They travel deep below Earth’s surface": No, surface waves travel along the surface (near the surface), not deep below. So the correct option is the third one.

Answer:

They are produced by P and S waves