42. Which of the following is TRUE regarding deserts and erosion? a) all of thes

Question

42. Which of the following is TRUE regarding deserts and erosion?

a) all of these

b) Water is scarce in deserts, but has a great effect on desert erosion

c) Deserts are generally very eroded

d) The typical lack of plants in deserts encourages erosion

43. Please describe the landform assemblage we have in the Imperial Valley and provide examples of one erosional and one depositional landform we could find here.

44. Please explain where we would generally expect to find coral reefs, and describe the environmental conditions necessary for coral to flourish.

45. Although oscillating waves in oceans and lakes appear to be moving forward, the motion they cause is actually

a) up and down

b) backwards

c) side to side

d) compressing

46. Please describe the conditions of a coastline that would best promote beach formation.

Explanation / Answer

42) All the above

44) Reef-building corals are restricted in their geographic distribution by their physiology. For instance, reef-building corals cannot tolerate water temperatures below 180 Celsius (C). Many grow optimally in water temperatures between 230and 290C, but some can tolerate temperatures as high as 400C for short periods. Most also require very saline (salty) water ranging from 32 to 42 parts per thousand, which must also be clear so that a maximum amount of light penetrates it

Coral reef are found in all three portion of earth - pacific , Atlantic and Indian oceans

45) Up and down

46) The beach profile typically can be divided into two distinct parts: (1) the seaward and relatively steep sloping foreshore, which is essentially the intertidal beach, and (2) the landward, nearly horizontal backshore. Beach profiles take on two different appearances, depending on conditions at any given time. During quiescent wave conditions, the beach is said to be accretional, and both the foreshore and backshore are present. During storm conditions, however, the beach experiences erosion, and the result is typically a profile that shows only the seaward sloping foreshore. Because the beach tends to repair itself during nonstorm periods, a cyclic pattern of profile shapes is common.

43) Example of

Erosional landform - Glacier landform ; Depositional lanform - Delta, sand dunes

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