WorksheetsIrrigation, animal grazing, & pesticides on Ecosystems
Total questions: 13
Worksheet time: 12mins
Name to purpose of agriculture (Choose the BEST answer)
developed to serve food to people
developed to grow food to people
developed to grow and supply food to people
Check all that are true for present day agriculture
Food crops are shrinking and food supply is limited
increases in food have helped populations grow
as population grows, so does the need for space to grow more food
global warming has future impacts on food growing
As greenhouse gases increase and the planet warms ...
there has been an increase in droughts and heavy rains
crops flourish and produce much more food
amount of land to cultivate increases
True or False - Farmers often use methods that are not sustainable.
(a)
Irrigations are systems that serve for:
the process of clearing the land to make more space for crops
the process of adding nutrients into the soil
the process of watering crops through pipes, canals and sprinklers
Which are consequences to using irrigation systems? Check all that apply
overwatering and flooding of non-agricultural areas
cause flooding that creates soil conditions that poison plant roots
draining water out of rivers and underground water systems
draining water out of rivers and underground water systems
soils in some areas can become more rich in nutrients
True or False: Heavy irrigation can cause heavy rainfall, or affect rainfall thousands of miles away from irrigated areas.
True
False
Two of the greenhouse gases released by livestock (grazing animals) are:
(a)
True or False: Grazing animals often over graze and damage grass roots so that grasses can not regrow back
True
False
Due to animals grazing near water systems, the end result can be ...
(a)
The positives of chemical fertilisers ... (check all that apply)
only protect the environment and help crop growth
contain nutrients that plants need to grow
are made with nitrogen and phosphorus
help double how much food farmers can produce
Over fertilising a system (or too much nitrogen or other nutrients released into an ecosystem) can lead to ...
A dead zone is an area that
bunches of dead animals decompose
is the result of over growth of algae that leaves little or no oxygen
a place where a student spaces out
a new movie shown in Science class
