Agriculture - introduction Flashcards
Advantages of the agriculture revolution
Controllable food supply
Surplus of food
Practised all over the world
Disadvantages of the agricultural revolution
Labour problems
High energy use
Habitat loss
Pollution issues - fertilisers
Definition of pasture
Grassland where animals can graze e.g. cattle and sheep
Issues associated with agriculture and why we should study it
Energy and water use
Habitat loss
Pollutant problems - organic and inorganic
WHY?
Vast majority of the world is dependent on someone else making their food
Definition of autotroph
Organisms that produces its own energy
Definition of photoatotroph
Organism that uses sunlight to produce its own energy through photosynthesis
Definition of chemoautotroph
An organism that make its own food using energy from chemical reactions instead of using sunlight
Examples of photoautotrophs
Plants
Algae
Cyanobacteria
Examples of chemoautotrophs
Sulfur-oxidising bacteria
Nitrifying bacteria
What is the advantage of being an autotroph
Produce their own energy/food
Not reliant on other organisms
What is the disadvantage if being an autotroph
Reliant on environmental conditions e.g. sunlight
Define heterotroph
Organism that can’t produce its own food and must obtain energy by consuming other organisms
What is a disadvantage of being a heterotroph
Depend on other organisms for food
Vulnerable to changes in the availability of food sources
