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level: Level 1

Questions and Answers List

level questions: Level 1

Question	Answer
each link or step in a food chain that describes energy consumption	trophic levels
all living things inhabiting the earth	biotic factors
the nonliving parts of an environment	abiotic factors
individual living thing (most specific, 1)	organism
sum of all ecosystems on earth (most broad, 6)	biosphere
group of the same species (2)	population
all populations in the same area (3)	community
community and its environment's abiotic factors (4)	ecosystem
large geographical areas with distinct plants, animals, climate, and terrain (5)	biome
what biome is virginia in	temperate deciduous forest
the variety observed within an environment including organisms and genes; a lot in forests & wetlands	biodiversity
wetlands formed when rivers meet the sea containing a brackish mixture of freshwater & saltwater	estuaries
largest estuary in the u.s.	chesapeake bay watershed
first reason biodiversity is important	medicine, wood, clothing, rubber, adhesives
second reason biodiversity is important	warn us of toxins in environment
third reason biodiversity is important	inspiration for engineering and technology
fourth reason biodiversity is important	maintain atmosphere by adding oxygen and removing carbon dioxide
fifth reason biodiversity is important	prevent soil erosion
sixth reason biodiversity is important	purify water and cycle nutrients
seventh reason biodiversity is important	pollination
eighth reason biodiversity is important	prey needs predators
causes for species extinction	overpopulation, pollution, invasive species, habitat loss, climate change
main reason for loss of biodiversity	overpopulation
why does the human population keep growing	resources and technology
max population size that can be supported based on food, water and land resources	carrying capacity
how much of earth's water is accessible freshwater	1%
which is safer: tap water or bottled water	tap water
destruction of vegetation increases fertilizer runoff into water resulting in algal blooms that take oxygen from organisms creating dead zones	eutrophication
which type of animals are impacted the most by noise pollution	marine
species from other areas that were introduced to an environment they don’t belong to by humans	invasive species
model that shows how energy and biomass is transferred throughout an ecosystem	food chain
amount of matter comprising a group of organisms	biomass
each link or step in a food chain that describes energy consumption	trophic levels
as you move up a food chain what happens to the energy and biomass	decreases
shows all possible feeding relationships in a community	food web
predator or prey that exhibits the highest number of interactions	keystone species
interspecies interaction	symbiosis
parasite benefits while the host is harmed	parasitism
both species benefit	mutualism
one species benefits while the other is neither harmed nor helped	commensalism
behaving in a way that increases another’s survival while decreasing one’s own survival	altruism
the role or function a species plays in its environment	niche
a gradual sequence of events in which more and more species come together to form a brand new community	succession
pioneer organisms colonize new sites on bare rock that forms when glaciers melt or volcanic lava cools and hardens	primary succession
occurs on new soil due to a natural disaster or human disturbance	secondary succession
when a stable, mature community is achieved and succession no longer occurs	climax community
pattern of how a population is spread out across its habitat	dispersion
due to social behavior, defense or grouped resources	clumped
due to territorial behavior	uniform
non-territorial	random
what affects population growth	population density and limiting factors
formula for population density	number of individuals/area squared
anything that causes a decrease in population	limiting factors
disease & competition cause more deaths because the density is higher	density-dependent
human disturbances or natural disasters that randomly decrease population no matter the size	density-independent
rapid, continual population increase due to unlimited resources	exponential growth
exponential that slows forming an s shaped graph because of the carrying capacity	logistic growth