ORGANISATION Flashcards
define popualtion
species that occupy the same habitat
define habitait
place where an organism lives
define community
population of different species interacting
define ecosystem
interactions between the biotic and abiotic factors in the area
what do food chains shoew
the feeding relationships and the flow of energy
define biomass
total mass of living material
what are trophic levels
stages in the food chain
what do arrows in the food chain represent
direction of biomass transfer
describe a simple foodchaion
producer
primary consumer
seocnadyre consumer
tertiary consumer
what is a producer
an organism that makes its own food
what types of organism are producers
photosynthetic organism that trap energy from the sun
what is a predator
a consumer that kills and eats other animals
what is prey
an animal that is killed and eaten by another animal
describe the pattern of predators and prey in a stable community
rise and falls in cycle s
why are produces the first trophic level
provide all biomass for the food chain (production of glucose vat phtootysntehis)
the rest of food chain involves the transfer of this biomass
what pices of apparatus measures the abundance and distribute. of organism in an area
quadrat
what is sued to study the distribution of organism
transect
describe the carbon cycle
plants turn co2 into molecules during photosynthesis
passed onto organism that eat the plants
released back into the atmosphere by respiration
burning fossil fuels also released carbon dioxide into the atompshere
why si the cabron cycle important
for living organism to grow and provide energy for vital fucnitons in cells
describe the water cycle
taken form lakes and oceans evaporates
water condenses into clouds and returns to earth as precipitation
useful for life on land
returns to rivers fan oceans by surface run off
what effects can sulfur dioxide have on the environment
formed when fossil fuels are burnt
forms acid rain which damages buildings and plants
what are the impacts of carbon monoxide
from incomplete combustion of fossil fuels
prevents haemoglobin carrying oxygen
3 green house gases
water vapour
carbon dioxide
methane
activities that contribute to green house gases
during fossil fuels
deforestation
large scale livestock farming
