4.3 B

Question 1

What is storm frequency

Answer 1

Storm frequency is the trends and changes in storm patterns

Question 2

What are prevailing winds and how do they contribute to longshore drift

Answer 2

The prevailing winds are the winds that blow in the most frequent direction . Prevailing winds change the direction of waves which push up the sediment onto the beach

Question 3

What are destructive waves

Answer 3

Destructive waves commonly occur due to storms . The are quite large and power. This can only happen when the energy is high . They tend to erode the coastline and have more powerful backwash than swash

Question 4

How does marine processes effect the coastline

Answer 4

Hydraulic action caused by storms and prevailing winds will increase erosion and create joints and faults. Transportation like saltation contributes to the coastline transporting sediment to beaches

Question 5

Name all of the sub Ariel processes

Answer 5

Freeze thaw weathering-
Exfoliation 
Biological weathering 
Chemical weathering 
Mass movement 
Rock falls

Question 6

How do sub aerial processes effect the landscape

Answer 6

Freeze thaw weathering widens cracks by freezing and melting increasing the size of the cracks

Exfoliation is the process of peeling and replacing rocks

Question 7

Describe the three different types of weathering

Answer 7

Chemical weathering is chemical reactions resulting in acidic substances wearing the rocks away

Physical weathering is the pressure put on rock over time eroding the materials

Biological weathering is when plants grow in cracks and when they increase in size the cracks widen

Question 8

What is the rate of coastal reatreat

Answer 8

The retreat of the coastline is the process in which hydraulic actions and weathering erodes the rock retreating the remaining materials

Question 9

How has the rate of costal retreat increased

Answer 9

Strong prevailing winds creating longshore drift that moves material south along the coastline.
The cliffs are made of a soft boulder clay. It will therefore erode quickly, especially when saturated.

Question 10

What is mass movement

Answer 10

Mass movements. This is where land movement at a range of speeds results in destruction of property and/or loss of life. It is often triggered by human activity.