Simultaneous wind waves of many wavelengths forming a chaotic ocean surface.

Simultaneous wind waves of many wavelengths forming a chaotic ocean surface.

• A. Sea State
• B. Progressive Wave
• C. Internal Wave
• D. Sea

Answer: (D)

The main idea is recognizing what the sea surface looks like when wind creates many waves of different sizes. The surface of the ocean, especially under wind, is made up of a mix of waves with a range of wavelengths. When all those waves overlap, the surface appears chaotic and rough. This broad, ever-changing surface is simply the sea—the body of water at the surface. A single progressive wave would be one wave traveling in a direction, not the messy, multi-wavelength mix described. An internal wave occurs within the water below the surface and doesn’t describe the surface chaos. So the best term for a chaotic surface formed by simultaneous wind-driven waves of many wavelengths is the sea.

The main idea is recognizing what the sea surface looks like when wind creates many waves of different sizes. The surface of the ocean, especially under wind, is made up of a mix of waves with a range of wavelengths. When all those waves overlap, the surface appears chaotic and rough. This broad, ever-changing surface is simply the sea—the body of water at the surface. A single progressive wave would be one wave traveling in a direction, not the messy, multi-wavelength mix described. An internal wave occurs within the water below the surface and doesn’t describe the surface chaos. So the best term for a chaotic surface formed by simultaneous wind-driven waves of many wavelengths is the sea.