Tsunamis

Question 1

What do tsunamis affect?

Answer 1

Not just the surface of water, but the whole column of water from the surface down to the seabed

Question 2

What are tsunamis like in very deep water? 3

Answer 2

Waves travel at high speeds of 500-950 km/h
Long wavelength of 200 km
Small amplitude (wave height) of 1m

Question 3

What happens to tsunamis as they get closer to land? 5

Answer 3

Get shallower
Waves get compressed and their energy becomes more concentrated
Waves slow down to less than 80 km/h
Wavelength decreases to less than 20 km
Amplitude increases to many meters

Question 4

What is drawback?

Answer 4

Just before the tsunami reaches the coast, the water withdraws down the shore

Question 5

What happens to the wave when it hits land?

Answer 5

Hits with great force, but only travels a short distance inland