12ESS Tsunami REVISION

Which of these events can create a tsunami wave:

• Strong winds

• Asteroid impact

• Strike-slip earthquake under the sea

• Normal or Reverse fault under the sea

• Underwater volcano eruption

How much of the water column gets displaced during a tsunami?

• ALL of it

• The top 200m only

• The bottom 200m only

• Half of it

This is the type of energy that objects have when they are up high eg. an incoming asteroid

• Gravitational potential energy

• Kinetic energy

• Elastic energy

• Heat energy

Waves transfer matter from one place to another

• TRUE

• FALSE

Waves transfer energy from one place to another

• TRUE

• FALSE

This is the height of a wave from sea level to top of a crest:

• Amplitude

• Wavelength

This is the width of a wave from crest to crest:

• Amplitude

• Wavelength

While a tsunami travels across the open ocean it has:

• Low amplitude

• Wide wavelength

• High amplitude

• Narrow wavelength

When a tsunami shoals at the shore it has:

• High amplitude

• Narrow wavelength

• Low amplitude

• Wide wavelength

Put these tsunami steps in order:

• Waves transfer energy quickly across the ocean (900km/h)

• Displacement of entire water column up/down

• Wave width gets narrow and amplitude increases to runup height

• Waves hit the shoreline and slow down due to friction

• Waves travel outward in all directions from the displacement