Question

What distinguishes a tsunami from other types of ocean waves?
A.

The wave height of a tsunami is much lower in the center of the ocean than it is near shore.

B.

A tsunami is caused by the disruption of deep ocean currents by volcanic eruptions.

C.

The wave energy of a tsunami increases as the water depth decreases.

D.

A tsunami forms when a large volume of water is suddenly displaced up or down.

Answer 1

@Abhisar

Answer 2

It should be A

Answer 3

As the tsunami approaches the coast and the waters become shallow, wave shoaling compresses the wave and its speed decreases below 80 kilometres per hour (50 mph). Its wavelength diminishes to less than 20 kilometres (12 mi) and its amplitude grows enormously.

Answer 4

I am kinda confused between A & C

Answer 5

@thomaster

Answer 6

@alphadxg

Answer 7

Umm I haven't really learned this too much, B is wrong (To a certain degree). D - is wrong because this has nothing to do on how a tsunami is formed.

So A or C so lets look at both of these

C - Greens law tells us how water depth affects the height of a tsunami wave.
If a tsunami wave has height H at an ocean depth D, and the wave travels
to a location of water depth d, then the new height h of the wave is given
by h= HR^0.25, where R is the water depth ratio given by R=D/d.

A - As a tsunami leaves the deep water of the open sea and arrives at the shallow waters near the coast, it undergoes a transformation. Since the velocity of the tsunami is also related to the water depth, as the depth of the water decreases, the velocity of the tsunami decreases. The change of total energy of the tsunami, however, remains constant ......
If the trough of the tsunami wave reaches the coast first, this causes a phenomenon called drawdown, where it appears that sea level has dropped considerably.

Now, can you pick out which one.

Answer 8

u hav the answers now @it_meh_miranda !

Answer 9

Thnx @alphadxg \(\color{green}{\huge\ddot\smile}\)

Answer 10

um A?

Answer 11

Bingo !!

Answer 12

lol