deserts and wind eolian - exam 1

Question 1

how does sediment move?

Answer 1

water
gravity
ice
wind

Question 2

a dry area on the lee side of a mountain range

Answer 2

rain shadow desert

Question 3

constant wind direction
limited sand supply

Answer 3

barchan dune

Question 4

constant wind direction
large sand supply

Answer 4

transverse dune

Question 5

converging winds
limited sand supply

Answer 5

longitudinal dune

Question 6

the most important erosional agent non the desert

Answer 6

water

Question 7

wind removes finer grained material and coarse material is left behind as a surface layer

Answer 7

desert pavement formation

Question 8

a cobble or pebble polished and shaped by the sandblasting effect of wind

Answer 8

ventifacts

Question 9

fan shaped deposit of sediment when a stream’s slope is abruptly reduced

Answer 9

alluvial fan

Question 10

an apron of sediment along a mountain front created by the coalescence of alluvial fans

Answer 10

bajada

Question 11

a stream that consists of numerous intertwining channels

Answer 11

braided stream

Question 12

the flat, central area of an undrained desert basin

Answer 12

playa

Question 13

a temporary lake in a playa

Answer 13

playa lake

Question 14

an isolated mountain remnant characteristic of the late stage of erosion in a mountainous arid region

Answer 14

inselberg

Question 15

causes loss of soil and vegetation in a desert

Answer 15

blowout

Question 16

produced when rocks become abraded by windblown sediment

Answer 16

ventifacts

Question 17

mounts and ridges of sand formed by sediment carried as part of the wind’s bed load

Answer 17

dunes

Question 18

extensive blankets of silt carried by wind in suspension

Answer 18

loess

Question 19

the two types of wind deposition

Answer 19

dunes and loess

Question 20

the basin and range region is characterized by

Answer 20

interior drainage

Question 21

responsible for most of the erosion work in a desert

Answer 21

running water

Question 22

the channels are carved largely by flash floods during sporadic storm events, these are called

Answer 22

ephemeral streams

Question 23

in dry lands, rock weathering is greatly

Answer 23

reduced

Question 24

dry climates cover about __ of earth’s land area

Answer 24

30%