4.1 Waves
What forces help to create ocean waves?
Friction and drag of air movement across the water
When considering gravitational pull on the Earth, which celestial body (the sun or moon) has the biggest pull?
What is the moon
In what region of the world do tsunamis usually occur?
What is the Pacific Ring of Fire?
What type of wave is responsible for "big wave" surfing in Hawaii
What are swells or breakers
This is the vertical difference in water level between high and low tide
What is Tidal Range
True or False, Tsunamis are controlled by the tides since they are sometimes called a tidal wave.
FALSE
How large can rogue waves get?
Up to 65 feet
List all three causes of a tsunami
Earthquake, Landslide, Volcano
What are some characteristics of rogue waves? List two
Their height is greater than twice the size of surrounding waves,
They often come unexpectedly from directions other than prevailing wind and waves
They are unpredictable.
When the sun and moon are in a line, what effect does this have on the tides?
This is a Spring Tide, causing the largest tidal range of the month.
Tsunami is the Japanese word for _____________
What is harbor wave?
What three things influence the size of an ocean wave?
What are: wind strength, wind duration, Fetch
If you observe two high tides in a day, one at 5 meters and the other at 1 meter. What type of tide could you infer this to be?
What is a mixed tide?
Describe the formation of a tsunami wave
As a tsunami gets nearer to land it is transformed. The speed at which a tsunami travels is related to the depth of the water.
When the tsunami is approaching land, the water depth shallows and the tsunami speed slows.
As it slows its height increases.