The Waves Crossword

Highest point above sea level
Lowest point below sea level
Half of a wave
Distance between two crests or troughs
Movement back and forth at a regular speed
Distance over water that wind blows in the same direction
Faster, longer period of waves appear as a regular pattern of crests and troughs moving across the sea surface
vertical distance from the top of the crest to the bottom of the trough
Wind drags across the surface of the water, stretching the surface resulting in wrinkles
time required for two successive crests to pass a point