quiz 25

Question 1

Formation of sand dunes

Answer 1

1. wind blows sand along the beach
   2, sand accumulates around an obstacle causing wind to drop sand called aeolian deposition
2. marram grass colonises the embryo dune and the roots stabilise the sand
3. over time marram grass dies forming fertile soul so more plants can colonise
4. small depressions form between dunes and fill with water called dune slacks

Question 2

Formation of tropical storm

Answer 2

1. The sun will heat the ocean causing water to evapourate
   2, warm moist air rises this is called a low pressure system
2. in the upper atmosphere temperatures are colder so water vapour cools and condenses forming thunder clouds
   4.due to the corolis effect the tropical storm will spin

Question 3

Give one u-turn for approriate technology to manage desertification

Answer 3

reliant on charity investment

Question 4

Give one u-turn for using afforestation to manage desertification

Answer 4

dependent on investment which means less improvement of services to improve development

Question 5

GIve one u-turn for soil managment to mange desrtification

Answer 5

dependent on knowledge and skills on different crops

Question 6

GIve a specific example of afforestation to manage desertification

Answer 6

the great green wall project in the sahel

Question 7

What is overgrazing?

Answer 7

when livestock eat to much vegetation from soil

Question 8

What is overcultivation?

Answer 8

farmers grow too many crops in an area

Question 9

Give a specific example of soil managment to manage desertification

Answer 9

crop rotation

Question 10

How does selective logging and replanting not harm future environmental needs

Answer 10

more trees are kept, so more carbon dioxide is absorbed from atmosphere so greenhouse effect is reduced

Question 11

how does ecoutourism not harm future needs

Answer 11

profits are used for conservation which reduces habitat loss so biodiversity is maintained

Question 12

how does overgrazing lead to desertification?

Answer 12

less vegetation to stabilise the roots increasing soil erosion leaving soil sandry,dry and infertile

Question 13

how does overcultivation lead to desertification?

Answer 13

they absorb all nutrients from the soil leaving it dry,sandy and infertile

Question 14

Give 3 big points for strategies to reduce risk of desertification?

Answer 14

soil managment, apporpriate technology and afforestation