# What Happens To A Wave As It Approaches Shore?

## What causes a wave to break as it approaches shore?

When wave energy passes through water into a shallow area, the waves break.

The lower part of the circular motion slows down as it scrapes the shallow bottom, and the upper part of the wave continues moving forward until it falls into air, or breaks..

## At what depth do waves break?

In general a wave will start to break when it reaches a water depth of 1.3 times the wave height. The type of wave that is produced is dependent on different factors.

## What is moving as a wave approaches the coast?

Waves at the Shoreline: As a wave approaches the shore it slows down from drag on the bottom when water depth is less than half the wavelength (L/2). The waves get closer together and taller. … Eventually the bottom of the wave slows drastically and the wave topples over as a breaker.

## How do you calculate wave base?

This depth is called the wave base, and it is equal to one-half the wavelength (L/2) measured from still water level. Only wavelength controls the depth of the wave base, so the longer the wave, the deeper the wave base.

## What happens to the height of a wave as it approaches shore?

It shows that as a wave approaches shore, its wavelength (increases) (decreases). The wave profile also shows that the wave height, the vertical distance between the crest and succeeding trough, (increases) (de- creases) as the water depth decreases. Eventually, the building wave collapses into breakers.

## What causes a wave to slow as it approaches a beach?

When the wave touches the bottom, friction causes the wave to slow down. As one wave slows down, the one behind it catches up to it, thus decreasing the wavelength. … 1 As waves approach shore they “touch bottom” when the depth equals half of the wavelength, and the wave begins to slow down.

## How fast do Tsunamis travel?

500 mphThe deeper the water; the faster the tsunami. In the deep ocean, tsunamis can move as fast as a jet plane, over 500 mph, and can cross entire oceans in less than a day. As the waves enter shallow water near land, they slow to the speed of a car, approximately 20 or 30 mph.

## Do waves lose energy as they travel?

As it travels, a sound wave’s energy is slowly lost as heat. … This happens because the molecules of the medium through which it is travelling knock against each other as they transmit the sound wave energy.

## What happens to wavelength after a wave feels bottom and approaches shore?

What happens to wave height after a wave feels bottom and approaches shore? Wave height increases. … Wave period increases 22.At what ocean depths is a 30-m wave length wave considered a deep water wave? At depths deeper than 15 meters.

## Why do waves get larger as they approach the beach?

As a wave moves into shallow water, its orbitals “feel the bottom,” causing it to slow down. The wave crests that are closer to the shore (“in front”) are in shallower water, so they are moving slower than the wave crests farther out in the ocean (“behind”). … This is why waves grow larger at a beach.

## What happens when a tsunami approaches the shore?

As a tsunami leaves the deep water of the open ocean and travels into the shallower water near the coast, it transforms. Consequently, as the tsunami’s speed diminishes as it travels into shallower water, its height grows. …