Why are there waves in the ocean?
Show answer & explanation
Answer: Wind friction on water surface
Wind friction on water surface ✓ — Correct! Wind blowing across the ocean transfers energy to the water through friction. This creates ripples that grow into waves. Wave size depends on wind speed, how long it blows, and the distance (fetch) over which it blows. The water itself doesn't move forward - energy does! Only the wave form travels; water particles move in circular orbits.
Moon pulls water up and down — Wrong. While the moon does affect ocean water, it causes tides (rise and fall over hours), not waves (which occur every few seconds). Tides are different from waves. Regular ocean waves are caused by wind, not lunar gravitational pull.
Ocean floor pushes water — Wrong. The ocean floor doesn't push water to create waves. Waves are surface phenomena caused by wind. However, underwater earthquakes can create special waves called tsunamis, but regular ocean waves come from wind friction on the surface.
More Earth Science questions
- In folded Appalachians, why can one rock layer become a ridge while its neighbor becomes a valley?
- Loose material moves downhill from a fresh fault scarp, rounding it. What sets the smoothing speed?
- Why can a long active fault affect more river basins than a short one?
- Why does erosion happen faster near active faults than in areas with heavy rain?
- Why can quartz sand with beryllium-10 reveal how fast a whole river basin erodes?
- Earthquake shaking lasts seconds. How can it leave rock easier for later rivers to erode?
