Resources Flashcards
what is the purpose of resources?
provide ppl w what they need
2 diff resources?
renewable/non - renewable resources
renewable resources, definition, examples
def - resources that will replace themselves through natural processes examples water soil fish air forests animals
non - renewable resources, definition, examples
definition - resources that will not replace themselves in our life time, once used up, they're done examples coal oil gold
effects of bad use of resources
damages resources
used up quicker
examples of bad use of resources
soil erosion bc of poor farming methods polluting water/air not replacing cut down trees no control over the rate resources are being used not recycling
overfishing, what is it?
taking fish faster than nature can replace them
why does overfishing occur? (3)
modern tech
growing population
lack of laws
effects of overfishing
reduced amnt fish, cannot reproduce fast enough
reduced biodiversity
unemployment/poverty
bycatch
overgrazing, how does it happen?
happens when too many animals = farmed on land
effects of overgrazing
soil erosion
no time 4 plants to grow back
dams = filled w soil, water washed off land
animals have no food, weak animals produce less offspring
land = no longer useful resource
ppl desert the land
sustainable, definition
able to be used at the same rate for a long time without threatening the supply
insulation, definition
preventing heat from entering/escaping
quota, definition
a maximum quantity that is allowed
habitat, definition
places where a specific plant/animal lives
size restriction, definition
limits for catching a fish which is too small to breed
unsustainable, definition
not being able to be used at the same rate for a long time without threatening the supply
ways to fish sustainably
fishing nets have to be a certain mesh size
quotas put in place
fish caught @ certain times of year
fish has to be certain size
fishing = controlled/prohibited in certain areas
sustainable grazing, what would it do? ways to do it?
- what would it do?
- restore land
- provide food 4 animals
- prevent soil erosion
- ways to do it
- rotational grazing
- strip grazing
- reducing no. of cattle on land
- learn good farming techniques
what can consumers do to be sustainable?
ask suppliers, produce sustainable goods
avoid not eco friendly
use recyclable packaging
buy loose products
what can government do to be sustainable
greener energy
recycling centres
public transport
laws, control pollution
how to lower your carbon footprint
turn off lights unplug device not being used energy saving lightbulbs alt forms energy (solar) walk, cycle, public transport buy local goods loose food recycle
food security, definition
everyone has permanent access to sufficient, safe, nutritious food
urbanisation, definition
when ppl move from rural to urban areas
staple grain crops, definition
food that provides the basis for most meals, e.g maize, bread
monoculture, definition
only one type of crop is grown
mechanisation, definition
when machinery = used in farming
government subsidies, definition
grants that the government give to farmers to assist w cost of farming
free range, definition
animals not kept in cages and can roam freely
problems in SA
most of land = not suitable for grazing/crop farming
lack of water for farming
western side of SA = sheep farming (dry area)
eastern side = cattle farming (wet area)
lotsa urbanisation in gauteng + western cape
population growing, demand for food = increased
solutions
(private sector investments) to help farmers w start up capital
(crop varieties), incr production
(water harvesting + storage systems)
(insurance and credit) for new farmers
factory farming
farming done on industrial scale
treatment of animals on factory farms
small cages
no exercise
fed growth hormones
genetic modification of crops, what does that mean?
changes genetic makeup of an organism
2 ways crops = modified
speed up animal breeding
create a new organism
advantages of gmos
less famine
more nutrition
less pesticides
disadvantages of gmos
damage environment
ONLY BENEFITS LARGE SCALE
some seeds don’t reproduce
use more water
