unit 5 Flashcards
to calculate percent of population
divide the unknown by total number
define food security
When all people have access to sufficent, safe, and nutritous food at all times
two causes of food insecurity
population growth
climate change- areas are experincingf more extreme weather and farms cant move north
two benefits of pyramid
reduces livestock while increasing crops, protects pollinating insects because of reuction of pesticides `
3 methods to reduce food insecurity
subsistence agriculture in both rural and urban areas. Improving transportation of food, and improving the way food is rationed
3 impacts food insecurity has on people
nutritional deficency, poverty, and conflict
select a technique and describe how it helps the soil
contour plowing allows for a more effective way to set up the rows of soil. This conserves the soil by keeping it from washing downhill
which layer has the highest humus concentration
a (topsoil)
advantage/disadvantage of cultavating sandy soil
exclellent drainage; but low water holding capacity
advantage/disadvantage of cultavating clayey soil
high water holding capacity; poor drainage
two ways in which soil can be damaged by agricultural practices
monocropping causes soil erosion meaning it takes from the soils nutrients. Tillage removes organic matter, leaving the plant exposed
what is meant by the term energy security
the reliable availabilty of energy sources at an affordable price with a considedration of enviormental impacts
state a non renewable resource
fossile fuels(oil, natural gas, coal
how does fossil fuel depletion lead to energy insecurity
fossil fuels are the cheapest form of energy. With their depletion, LIC’s wont have an affordable energy source
two reasons why coal oil and gas are so dominant
Easily available resources with collecting infastructure already in place. Energy compaines have a powerful influence
long term energy security
the country plans for future growth and change
short term energy security
country plans and is ready for a natural disatser
benefits of hydroelectric power
increases energy access and production, Dam construction allows for flood control and a stable water supply.
advantage/disadvantage of hydroelectric power
a: creation of wetland habitats
d: alters water supply for people downstream
3 impacts of energy insecurity on LICs
job loss, economic recession, increased energy prices of distrubition to homes and industries
2 causes of energy insecurity
a growing population demands more energy at a faster rate. Heavily relying on one source of energy.
why are coal oil and natural gas so dominant
They are cheap and plentiful, and no other source generates as much energy as fossil fuels
why are wind farms critisised
noisy and unappealing, they produce alot of ewaste because of the power lines needed to connect them, bats and birds are threatned
why do we need alternatives to coal
its depleting rapidly and is hard to transport. Its bad for the enviorment because of the toxins it releases in the atmosphere
