Tsunami Waves and Ocean Dynamics

The video tutorial discusses the dynamic nature of ocean waters and the factors causing their movement, such as temperature, density, salinity, gravitational forces, and geological events. It explains the three main forms of ocean water movement: waves, tides, and ocean currents. The tutorial delves into the formation and characteristics of sea waves, including their structure and velocity, and highlights the destructive potential of tsunamis, using the 2004 Sumatra earthquake as an example.

What are the main factors that cause the movement of ocean waters?

• Earthquakes and volcanic eruptions

• Temperature, density, and salinity

• All of the above

• Gravitational pull of the sun and moon

Which of the following is NOT a form of ocean water movement?

• Ocean currents

• Tides

• Rainfall

• Waves

What is the term used for the ripples formed on the sea surface due to wind?

• Tides

• Sea waves

• Tsunamis

• Ocean currents

Which components are used to express the length and amplitude of waves?

• Height and depth

• Peak and trough

• Crest and base

• Width and length

What happens to a floating object in the sea when waves pass by?

• It moves towards the coast

• It oscillates up and down

• It moves in circles

• It sinks

How does the velocity of waves relate to wind speed?

• Higher wind speed increases wave velocity

• Higher wind speed decreases wave velocity

• Wind speed has no effect on wave velocity

• Wave velocity is constant regardless of wind speed

What natural events can generate tsunamis?

• Hurricanes

• Earthquakes and volcanic eruptions

• Heavy rainfall

• Tornadoes

What is a significant characteristic of tsunami waves as they approach the coast?

• They disappear

• They remain the same height

• They gain height

• They lose height

Which event in 2004 caused a devastating tsunami affecting India and Sri Lanka?

• Indian Ocean cyclone

• Pacific typhoon

• Sumatra earthquake

• Hurricane Katrina

What is the primary cause of destruction by tsunami waves?

• High wind speeds

• Their immense height and energy

• Low pressure systems

• Heavy rainfall