psysical n enviro variable (climate) Flashcards Preview

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Flashcards in psysical n enviro variable (climate) Deck (26)
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1
Q

what are the key environmental variables that determine farming patterns?

A

soils and climate

2
Q

most crops require what to grow well?

A

climatic conditions

3
Q

what are the examples of crops that are grown commercially?

A

rice and potatoes

4
Q

what does rice require to grow?

A

high rainfall

5
Q

why does rice need high rainfall?

A

needs a period of time standing in water

6
Q

what temperature does rice grow best in?

A

between 16 and 27c

7
Q

what type of soils does rice grow best in?

A

alluvial soils

8
Q

what are alluvial soils?

A

fertile soils deposited when a river floods

9
Q

why are clay soils good for rice?

A

retain water

10
Q

how is potato blight caused?

A

too much rainfall, disease that destroys potato

11
Q

what temperatures do potatoes grow best in?

A

18-20c

12
Q

what kind of soils do potatoes prefer?

A

loos and sandy soils

13
Q

what type of agriculture takes place in polar regions?

A

nomadic cultivation

14
Q

what is nomadic cultivation?

A

when a farmer moves form one place to another to find better supplies such as water

15
Q

what is sedentary farming?

A

when a farmer stays in the same place

16
Q

what prevents sedentary farming in polar regions?

A

permafrost

17
Q

what are the two climatic types?

A

semi arid and mediterranean

18
Q

where are semi arid climates found?

A

near the equator

19
Q

what are examples of areas with a semi arid climate?

A

savannah grassland, sahel (below the sahara)

20
Q

why are species adapted in stem arid climates?

A

they experience wild fires

21
Q

where are mediterranean climates found?

A

warm coastal areas 30-40 degrees in latitude

22
Q

what does of vegetation is found here?

A

shrubs, bushes, small trees

23
Q

how much rain do Mediterranean climates receive a year

A

50 cm

24
Q

how much rain do semi arid climates receive?

A

25-50 cm a year

25
Q

what is the difference in seasons between the two climates/

A

Mediterranean experiences distinct summer and winter seasons whereas semi arid does not

26
Q

what kind of threat are areas with a Mediterranean facing?

A

development as they are desired areas