Topic 5 Flashcards
organism
living thing
habitat
place for a living thing to live, grow and reproduce
biotic factor
living things of an ecosystem
ex: coyote, frog, trees, plants
abiotic factor
non-living things of an ecosystem
ex:water, oxygen, space, rocks
population
all members of one species living in a particular area
community
all the different populations that live together in an area
ecosystem
all abiotic and biotic factors of a particular area
limiting factor
an environmental factor that causes a population to stop growing
Levels of Organization of an Ecosystem
Organism, Population, Community, Ecosystem
Population Density
number of individuals/unit area
population stability
births=deaths
population increase
number of births is greater than number of deaths
population decrease
number of deaths is greater than number of births
immigration
moving into a population
emigration
moving away from a population
producer
organism that makes its own food
consumer
organism that eats other organisms for energy
decomposer
break down biotic wastes and dead organisms
food chain
a series of events in which one organism eats another to obtain energy and nutrients
food web
many overlapping food chains in an ecosystem
Levels of the Energy Pyramid
(bottom to top)
producers, first-level, second-level, third level
As you go up in the Energy Pyramid the amount of kilocalories (kcal)…
decreases by 1/10
Which model best illustrates for flow of energy in an ecosystem best?
food web is more complex
carnivore
producer that only eats meat
omnivore
producer that eats meat and plants
herbivore
producer that only eats plants
scavenger
a carnivore that eats the remains of dead organisms
law of conservation of mass
matter is neither created nor destroyed during any chemical of physical change.
law of conservation of energy
when one form of energy is transformed to another, no energy is lost int he process
evaporation
process of liquid changing to a gas
condensation
process of a gas changing to a liquid
precipitation
water falling to the ground in the form of rain, snow, sleet or hail
Carbon Cycle
-Producers use carbon to make food.
-Consumers and producers release carbon as waste.
-Decomposers release carbon into soil and air
Oxygen cycle
Producers release oxygen
Consumers take in oxygen
Human Impact
human activities can make the oxygen and carbon unbalanced through deforestation and overuse
