Geography constructive and destructive waves

Geography constructive and destructive waves Eruptions The main cause of earthquake is volcanic eruptions. Apply and extend previous understandings of multiplication and division to divide fractions by fractions; multiply and divide multi-digit numbers and find common factors and multiples; apply and extend previous understandings of numbers to the system of rational numbers.

In some beaches calcium carbonate is able to bind together other sediments to form beachrock and in warmer areas dunerock. These faults occur due to the impact of geological forces. Check this BBC animation to make sure you understand what's going on. The shells and skeletons of many organisms are of calcium carbonate and when this is broken down it forms sediment, limestone and clay.

This movement is known as beach drift Figure 3. Apply and extend previous understandings of arithmetic to algebraic expressions; reason about and solve one-variable equations and inequalities; represent and analyze quantitative relationships between dependent and independent variables.

Use a diagram to help you to explain. Friction is created at the boundary between the air and water, pushing water in the direction of the wind.

These waves are known as seismic waves. Wave action and longshore drift[ edit ] Port Campbell in southern Australia is a high-energy shoreline. Sea levels are currently quite high, while just 18, years ago during the Pleistocene ice age they were quite low. Mining can also cause disturbance due to the extensive removal of rocks from different areas.

They do the opposite to destructive waves and increase the size of the beach by piling sediment up onto the berm.

Coastal processes

Forearc and Wadati—Benioff zone Large, shallow earthquakes on subduction zone interfaces are the largest types of earthquakes. Their range is also limited. Sea levels are currently quite high, while just 18, years ago during the Pleistocene ice age they were quite low.

There the water evaporates and the salt crystallises, creating pressure and often breaking down the rock.

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This normally happens at a certain depth, about 70 to 80 miles below the Earth's surface, and so volcanoes are formed fairly close to, but not right next to, the trench.

Probably the most important effect is longshore drift LSD Also known as Littoral Driftthe process by which sediment is continuously moved along beaches by wave action. In this way the wave can move forward and will continue doing so until it either reaches an obstacle, like land, or it runs out of energy, eg: Wind carries salt spray onto rocks, where it is absorbed into small pores and cracks within the rocks.

Just be aware that they are still a type of ocean wave. Convection currents moving in opposite directions caused by the intense heat of the Earth's interior in the mantle move two plates apart.

These waves were hardly breaking at all, but it was clear that small particles were being pushed up the beach. The crest and trough of a wave are the highest and lowest points of a wave respectively. As the ice sheets receded the reverse process happened, as the land was released from the weight.

Depositional Features Deposition occurs when materials are moved and then left in situ. An exception to this includes Hawaii, which is found in the middle of the Pacific plate over a hot spot. Destructive waves are formed by strong winds with large fetch areas.

Coastal geography

The weight of the ice caused northeast Scotland to sink, displacing the southeast and forcing it to rise. Warm weather can encourage biological processes to occur more rapidly.

The swash of the wave tends to push material up the shore and the backwash tends to wash it back again. This is the length of water the wind has blown over. Student engagement in scientific investigation provides background for understanding the nature of scientific inquiry.

Here, the Indo Australian plate is colliding with the Eurasian plate and has done so for millions of years.Jul 14,  · Constructive waves are low energy waves that deposit materials on a coast. As the waves approach such as coast, the friction between the waves and the sea bed causes the waves to slow down at some distance from the coast.

Constructive waves have low wave height and long wave length with low frequency, between 6 and 8 waves per minute. Constructive waves are associated with weak backwash and strong swash, which builds up wide flat beaches and so more associated with coasts of deposition.

Waves are generated by wind blowing over the sea. The characteristics of waves are determined by the strength of the wind, its duration and fetch (distance a wave travels). The stronger the wind the greater the friction on the surface of the sea and therefore the bigger the wave.

Destructive waves are associated with stormy conditions and occur where there is a long fetch and strong winds. The waves in the picture were breaking at a frequency of 14 per minute, each swash being interrupted by the powerful backwash of the previous wave.

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Coastal geography is the study of the constantly changing region between the ocean and the land, incorporating both the physical geography (i.e.

coastal geomorphology, geology and oceanography) and the human geography (sociology and history) of the includes understanding coastal weathering processes, particularly wave action, sediment movement and weather, and the ways in which humans.

GCSE COASTS VOCABULARY. Abrasion: wearing away of cliffs by sediment flung by breaking Corrasion.

Angle of Dip: the angle of the bedding planes which affects the shape of the cliff. If the rock layers are horizontal, small overhangs of more resistant rock form in the cliff face.

Geography constructive and destructive waves
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