4.7.2 organisation in an ecosystem Flashcards
photosynthetic organisms are known as
producers
Feeding relationships can be represented as a
food chain
all food chains begin with..
a producer
a plant is known as a producer because…
its produces its own food!
Plants make glucose in what process?
photosynthesis
What piece of equipment would you use to estimate population size?
quadrat
What piece of equipment would you use to measure change in distribution of an organism from one area to another?
tape measure - use to make a transect
The mean is
the average - add up all the data and divide by how many you have
The mode is….
the most popular/number that occurs most frequently
The median is
the middle value - once all data has been organised into numerical order
An organism that eats other animals is known as a
predator
Animals that are hunted and eaten by other animals are called
prey
In a stable community what happens to the number of predator and prey?
rises and falls in cycles
carbon is returned to the atmosphere as
carbon dioxide
What process returns carbon dioxide to the atmosphere?
respiration
which process removes carbon dioxide from the atmosphere?
photosynthesis
Which organisms carry out decay?
microbes/micro-organisms
What conditions are necessary for decay?
warmth, moisture, energy source and oxygen
What is biomass?
dry mass, energy store - makes up the living material of all living organisms
The population size of any species is limited by..
food availability