Download LS2.A- Interdependent Relationships in Ecosystems

INTERDEPENDENT
RELATIONSHIPS
IN ECOSYSTEMS!
INFORMATION AND ACTIVTIES (NGSS LS2.A)!
Ecosystems: Interactions, Energy, AND Dynamics!
Ngss Ms-ls2 !
!
BY BIOLOGYGUY!
1"
Thank"you"for"purchasing"this"NGSS"aligned"resource"“LS2.A:'Interdependent'Rela2onships'in'
Ecosystems”.""This"resource"includes"informa;on"and"ac;vi;es,"which"cover"the"core"ideas"for"the"unit"
“MSALS2"Ecosystems:"Interac;ons,"Energy,"and"Dynamics”. !
"
"
Students"will"read"the"required"informa;on,"complete"ac;vi;es,"and"then"assess"their"learning"using"the"
performance"based"assignments.""Each"assignment"is"aligned"to"the"performance"standards"which"are"
found"in"the"Next"Genera;on"Science"Standards"MSALS2"Ecosystems:"Interac;ons,"Energy,"and"Dynamics.""
Each"assignment"includes"notes,"rubrics"and"an"answer"key.""This"resource"will"cover"the"following"
standards"and"topics."
"
STANDARDS:'
LS2.A:'Interdependent'Rela2onships'in'Ecosystems'
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TOPICS:'
1.  What"are"ecosystems?"
2.  What"can"affect"the"popula;ons"of"organisms"that"live"in"an"ecosystem"
3.  What"can"limit"popula;on"growth"
4.  Interac;ons"that"occur"between"living"things,"PredatorAPrey,"symbio;c,"compe;;ve."
'
'
This"resource"is"designed"to"be"delivered"to"your"students"over"a"1A2"week"period."Each"informa;on"sheet,"
ac;vity"and"assessment"material"includes"performance"and"standard"indicators,"so"that"you"and"your"
students"know"which"standards"are"being"addressed."""I"have"also"included"a"graphic"organizer,"which"can"
be"used"by"your"students"to"record"key"pieces"of"informa;on."
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I"hope"that"you"enjoy"this"resource."
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Best"wishes,"
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Biologyguy."
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2"
Biologyguy"©"
THANK YOU!
INTERDEPENDENT'RELATIONSHIPS'GRAPHIC'ORGANIZER'
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"""""""""""""""""""""""""""DATE:_______"
NAME________________""
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"LESSON"TITLE___________________________"
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Read"the"informa;on"page"and"complete"this"graphic"organizer"as"you"read"it."
"
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" WORDS'THAT'I'DO'NOT'KNOW'
KEYWORDS'
KEY'FACTS'
KEY'FACTS'
KEY'FACTS'
KEY'FACTS'
biologyGuy
3"POINT"SUMMARY"
4"
THANK YOU!
3. 
4. 
Pixabay.com"
By"Tsilia"yotova"(Own"work)"[CC"BYASA"4.0"(hgp://crea;vecommons.org/licenses/
byAsa/4.0)],"via"Wikimedia"Commons,"pond"ecosystem"
By"Thompsma"(Own"work)"[CC"BYASA"3.0"(hgp://crea;vecommons.org/licenses/
byAsa/3.0)],"via"Wikimedia"Commons,"frog"showing"flow"of"energy"
hgps://commons.wikimedia.org/wiki/File:Volterra_lotka_dynamics.PNG#file,"
predator"prey"rela;onship"graph."
5"
Biologyguy"©"
1. 
2. 
MS-LS2 Ecosystems: Interactions, Energy, and
Dynamics!
!
Performance Standards!
6"
Biologyguy"©"
Students"who"demonstrate"understanding"can:"
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MSRLS2R1.'Analyze"and"interpret"data"to"provide"evidence"for"the"effects"of"resource"
availability"on"organisms"and"popula;ons"of"organisms"in"an"ecosystem."[Clarifica;on"
Statement:"Emphasis"is"on"cause"and"effect"rela;onships"between"resources"and"growth"of"
individual"organisms"and"the"numbers"of"organisms"in"ecosystems"during"periods"of"
abundant"and"scarce"resources.]"
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MSRLS2R2."Construct"an"explana;on"that"predicts"pagerns"of"interac;ons"among"organisms"
across"mul;ple"ecosystems."[Clarifica;on"Statement:"Emphasis"is"on"predic;ng"consistent"
pagerns"of"interac;ons"in"different"ecosystems"in"terms"of"the"rela;onships"among"and"
between"organisms"and"abio;c"components"of"ecosystems."Examples"of"types"of"
interac;ons"could"include"compe;;ve,"predatory,"and"mutually"beneficial.]"
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MS-LS2 Ecosystems: Interactions, Energy, and
Dynamics!
!
Core Ideas!
• 
In"any"ecosystem,"organisms"and"popula;ons"with"similar"requirements"for"food,"
water,"oxygen,"or"other"resources"may"compete"with"each"other"for"limited"
resources,"access"to"which"consequently"constrains"their"growth"and"reproduc;on."
(MSALS2A1)"
• 
Growth"of"organisms"and"popula;on"increases"are"limited"by"access"to"resources."
(MSALS2A1)"
• 
Similarly,"predatory"interac;ons"may"reduce"the"number"of"organisms"or"eliminate"
whole"popula;ons"of"organisms."Mutually"beneficial"interac;ons,"in"contrast,"may"
become"so"interdependent"that"each"organism"requires"the"other"for"survival."
Although"the"species"involved"in"these"compe;;ve,"predatory,"and"mutually"
beneficial"interac;ons"vary"across"ecosystems,"the"pagerns"of"interac;ons"of"
organisms"with"their""environments,"both"living"and"nonliving,"are"shared."(MSA
LS2A2)"
"
"
7"
Biologyguy"©"
LS2.A:'Interdependent'Rela2onships'in'Ecosystems'
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•  Organisms,"and"popula;ons"of"organisms,"are"dependent"on"their"environmental"
interac;ons"both"with"other"living"things"and"with"nonliving"factors."(MSALS2A1)"
L1: WHAT ARE ECOSYSTEMS?
Ecosystem can be defined as the living and non living things that make up your surroundings (environment). For example if
you are sitting in a classroom right now, your Ecosystem is the classroom, the living things are the students, teacher and
Jimmy the cockroach, who is lurking in the corner. The non living components are the desks, chairs, windows, white board,
blinds and doors.
The living things that can be found in an ecosystem are called biotic factors, the non living things are called abiotic factors.
1. 
Describe the ecosystem that you are in right now. What are the biotic and abiotic factors?
ECOSYSTEM: ___________________________________________________________________
ABIOTIC FACTORS:________________________________________________________________
BIOTIC FACTORS:_________________________________________________________________
There are many different types of ecosystems that exist on earth. All ecosystems are categorized into 3 main types,
terrestrial, fresh water and ocean. For example terrestrial ecosystems, include deserts, forests, grass lands, arctic tundra.
Ocean ecosystems, include ecosystems that are found in the ocean, such as corral reef, shallow water, rocky shoreline
formations, deep ocean water. Fresh water ecosystems include lakes, rivers, streams and ponds.
The abiotic factors and biotic factors
within this ecosystem are linked,
through nutrient cycles and energy
flows. For example, the sun, which is
abiotic, provides energy for the
ecosystem. Plants (biotic) use the
suns energy to produce sugar,
through a process called
photosynthesis. This sugar/food is
then transferred to consumers, such
as insects. The energy from the sun
is stored as chemical energy within
the insect’s body, it will then be
transferred to the next animal that
eats it.
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Biologyguy"©"
FRESH WATER ECOSYSTEM
The diagram on the right depicts a
pond ecosystem. There are many
different organisms that live within
the area of the pond, together they
form a community.
L1: WHAT ARE ECOSYSTEMS? ACTIVITY
Biologyguy"©"
1."Define"ecosystem:____________________________________________________________"
_____________________________________________________________________________"
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2."Make"a"list"of"different"ecosystems"under"the"3"main"categories."
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OCEAN'
FRESH'WATER'
" TERRESTRIAL'
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3."Look"at"the"diagram"below"of"the"pond"ecosystem.""""
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a)"List"the"abio;c"factors"
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______________________"
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b)"List"the"bio;c"factors:"
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______________________
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______________________
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______________________
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______________________
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4."Research"or"create"your"own"ecosystem.""Describe"the"environment,"the"living"and"non"living"
things"that"live"there,""interac;ons"that"might"occur"between"these"organisms,"possible"food"
chains"that"might"exist"in"your"ecosystem."Present"your"findings"on"a"small"poster.""
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L2 HOW DOES THE ENVIRONMENT AFFECT ORGANISMS?
There a variety of ecosystems that can be seen throughout the planet. Some are more hostile than others.
Organisms depend on their environment (the surroundings and conditions in which an organism live). They
must interact with the living and non living things that are found within their environment in order to survive.
Doug has a happy life living in the city. He interacts with the people
living there, he has everything that he needs to survive, his apartment
is more than comfortable, he get his food from the store whenever he
wants, if it gets too hot, he goes inside and turns on the AC. Life is
good.
DOUG"
If Doug was placed in the pond ecosystem things would be different,.
He would interact with abiotic factors by drinking water, creating a
shelter and contribute to the nitrogen and carbon cycle, by producing
waste products, and breathing. Biotic interactions would occur, if he
ate the plants, and animals within the ecosystem, or even sheltered
from predators that might want to eat him. Life is not so good.
If Doug was placed in the desert, he might not do so well. The
environment is much more hostile, he would be exposed to blistering
temperatures, with very little shade, to protect him from the burning
sun. Abiotic factors such as the sun, sand, wind, and extreme
temperatures would make it very difficult for him to survive. The biotic
factors such as limited populations of organisms and his ability to hunt
them would affect his chances of survival. Life is bad!
However in the desert, his money would be of no value or benefit. He would be competing with predators such
as coyotes, bobcats, rattle snakes, hawks and eagles, which all eat similar food to what he eats. His inability to
interact with his environment as well as these animals would affect his chances of survival. As he would not have
the essential nutrients and energy from food to enable him to grow, and potentially reproduce.
10"
Biologyguy"©"
In all of the different ecosystems, Doug’s city, the pond and the desert, it is essential that Doug interacts with the
biotic and abiotic factors that exist in each environment. In some environments he was better adapted, meaning
that he would increase his chances of survival. In any ecosystem organisms with similar requirements for food,
water, oxygen or other resources, may have to compete with each other for limited resources. For example in the
city, Doug has to compete, with other people for resources such as shelter, food, and water. He may improve his
chances of achieving these by working harder to get more pay, which he can use to buy all of these resources.
L2 HOW DOES THE ENVIRONMENT AFFECT ORGANISMS? ACTIVITY
Pick"one"of"the"following"ecosystems:"the"city,"desert"or"pond."Produce"a"dummies""
guide"to"living"in"this"ecosystem.""
Use"the"rubric"to"help"you:"
"
RUBRIC:'
1.  I"have"a"dummies"guide"to"The"City/Desert/Pond."
2.  I"have"described"my"ecosystem."
3.  I"have"a"picture"of"my"ecosystem."
4.  I"have"listed"the"bio;c"factors."
5.  I"have"listed"the"abio;c"factors."
6.  I"have"described"the"weather,"climate"and"living"condi;ons"(abio;c"factors)."
7.  I"have"explained"what"resources"are"needed"to"survive"and"where"they"can"
be"taken"from?"
8.  I"have"explained"which"organisms"might"compete"for"these"resources."
9.  I"have"explained"how"the"environment"of"my"ecosystem"could"affect"a"
human"life."
10.  My"work"is"well"presented"and"shows";me"and"effort."
SCORE'
___/2"
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THE'CITY'
THE'POND'
THE'DESERT'
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Biologyguy"©"
1. 
L3 WHAT CAN AFFECT THE POPULATIONS IN AN ECOSYSTEM?
Quick write: Think about your neighborhood, and where you live. Make a list of factors that
could help you survive and a list of things that might result in your death.
______________________________________________________________
______________________________________________________________
______________________________________________________________
______________________________________________________________
Biologyguy"©"
Ecosystems"consist"of"living"and"non"living"things.""These"bio;c"and"abio;c"factors"can"affect"the"
number"of"organisms"that"might"live"there."The"number"of"organisms"within"a"certain"defined"area"is"
called"a"popula;on.""If"we"examine"the"pond"ecosystem,"it"is"possible"to"explore"the"bio;c"and"abio;c"
factors"and"how"they"might"affect"the"popula;on"of"a"species.""
"
Bio2c'factors'that"can"affect"popula;ons"
"
of"organisms"include:"interac2ons'with'
"
other'animals,"compe22on"and"
"preda2on.""The"fish"for"example"will"have"
"
to"interact"with"other"fish"of"its"own"
"species,"if"it"is"lucky"it"may"find"a"
"reproduc;ve"partner"to"produce"offspring.""
"
However"if"there"are"other"fish"of"the"
"same"species"which"are"more"adapted"to"
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the"pond"and"display"more"favorable"
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characteris;cs,"they"will"be"more"
"successful"in"reproducing.""Fish"will"not"
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just"compete"for"reproduc;on,"but"they"
"will"also"compete"for"available"resources,"
"
such"as"shelter"and"food.""The"more"
"
dominant"the"fish"the"more"chances"it"will"
"have"in"finding"the"food"and"shelter.""
"
Shelter"could"take"the"form"of"long"weeds,"
"plants,"or"rocks,"which"can"be"used"to"hide"
"
from"predators."""
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Predators"are"the"final"bio;c"factor."Larger"fish,"or"birds,"might"agempt"to"eat"the"fish.""The"greater"the"
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number"of"predators"in"the"area,"the"higher"the"chance"that"they"will"die"due"to"preda;on.""
"
"Abio2c'factors'that"can"affect"the"popula;on"of"organisms"include:"temperature,"light"and"availability"
"
"
of"water"and"nutrients."Within"an"aqua;c"ecosystem"such"as""a"pond,"acidity"and"salt"concentra;on"can"
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also"affect"the"popula;ons"of"the"organisms"that"live"there.""If"there"is"too"ligle"light"for"example"the"
"
plants"within"the"pond"will"not"receive"enough"light"to"photosynthesize,"this"could"affect"oxygen"and"
"
carbon"dioxide"levels"in"the"pond"in"addi;on"to"acidity.""Lack"of"plant"growth"would"then"affect"bio;c"
"
factors"by"increasing"compe;;on"for"resources."
"
"Therefore"the"growth"of"an"organisms"popula;on,"such"as"a"fish,"is"limited"to"the"resources"that"are"contained"
12"
"within"its"environment"and"the"the"bio;c"and"abio;c"factors"that"occur"within"its"ecosystem.""
""
L3 WHAT CAN AFFECT THE POPULATIONS IN AN ECOSYSTEM? ACTIVITY
1."Popula;ons"within"ecosystems"can"be"affected"by"bio;c"and"abio;c"factors.""Sort"the"
following"into"bio;c"or"abio;c"factors."""
Temperature
Interactions with organisms
Acidity of soil and water
Light
Nutrients
Competition for resources
predation
Salt concentration of the water
" availability of water
"
ABIOTIC'FACTORS'
" BIOTIC'FACTORS'
'
" '
'
" '
" '
'
" '
'
" '
'
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"2."SCENARIO:"You"are"stranded"on"a"desert"island.""For"each"of"the"factors"below"explain"how"
"they"might"affect"the"popula;on"of"your"group."
"
"
High"Temperature:"_____________________________________________________________"
"
""
Limited"tree"cover:______________________________________________________________"
"
""
Unlimited"supply"of"fish:_________________________________________________________"
"
""
"Fresh"water"stream:____________________________________________________________"
"
"The"presence"of"a"mountain"lion"that"lives"on"the"island:_______________________________"
"
"3."Explain"using"evidence"to"support"your"argument,"whether"you"think"that"your"popula;on"
"would"flourish"on"the"island"or"whether"you"think"that"it"would"die"out.""What"other"
"informa;on"might"be"needed"to"beger"answer"this"ques;on?"
"
______________________________________________________________________________
"
______________________________________________________________________________
"
Biologyguy"©"
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________"
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13"
4."Draw"a"diagram"of"your"island."Add"labels.""
"
L4: ANIMAL INTERACTIONS:
Within" an" ecosystem" there" can" be" a" variety" of"
species,"which"interact"with"each"other"on"a"daily"
basis." " These" interac;ons" can" be" compe;;ve,"
mutually"beneficial,"and"one"sided."""
"
The" 5" main" types" of" animal" interac;ons" are"
compe;;on," parasi;sm," mutualism," preda;on"
and"commensalism.""
Compe22on:" this" type" of" interac;on" is" where" organisms" in" the" ecosystem" compete" for"
resources." " These" could" include," food," water," shelter," space" and" reproduc;ve" partners."
The" compe;;on" can" be" between" different" species," and" organisms" of" the" same" species.""
For"example"two"camels"of"the"same"species"might"compete"for"the"same"female"partner."
Where" as" 2" different" species" such" as" the" ragle" snake" and" eagle," might" compete" for" the"
same"food."""
Parasi2sm:' involves" an" interac;on" between" species" where" one" organism"
benefits" at" the" expense" of" the" other." For" example" the" flea" or" ;ck" might"
agach"itself"to"the"body"of"a"deer"or"camel."The"flea"and";ck"will"benefit"as"
they" will" receive" nutrients" in" the" form" of" blood" and" a" place" to" live." " The"
camel,"will"not"benefit"as"they"will"feel"uncomfortable"and"constantly"itch."""
Mutualism:"when"two"organisms"benefit"from"an"interac;on,"this"is"called"
mutualism.""An"example"can"be"seen"with"bacteria"that"exist"in"the"gut"of"
humans."The"bacteria"benefit,"because"they"have"food"and"a"place"to"live"
and"reproduce.""The"human"benefits"because"the"bacteria"aid"diges;on."""
The'Flea'
DOUG"
Preda2on:' One" animal" ea;ng" another" animal" is" an" example" of" preda;on." " The"
predator"is"the"animal"that"eats"another"organism,"the"prey"is"the"animal"that"is"
eaten." "An"example"of" "preda;on"can"be"seen"in"lions"and"zebras."The"lion"is"the"
predator" and" the" zebra" is" the" prey." In" this" type" of" interac;on" the" popula;on" of"
each"organism"is"dependent"on"the"other."For"example"the"higher"the"popula;on"
of"lions,"the"lower"the"popula;on"of"zebra,"as"the"the"lions"will"eat"them"all." "This"
will"then"result"in"less"food"for"the"lions,"meaning"a"decrease"in"the"popula;on"of"
15"
lions,"and"then"an"increase"in"the"popula;on"of"zebra"as"there"are"less"lions"to"eat"
them."""A"predator"prey"rela;onship"is"formed.""'
Biologyguy"©"
Commensalism:" In" this" interac;on" one" organisms" benefits," but" at" no" expense" to" the" other"
organism.""An"example"can"be"seen"in"plant"seed"dispersal."Some"plants"have"developed"seeds"
which" have" s;cky" barbed" surfaces" which" can" agach" themselves" to" the" fur" of" animals." " The"
plant"benefits"as"its"seeds"are"transported,"the"animal"is"not"harmed"by"the"process."
L4: ANIMAL INTERACTIONS: ACTIVITY
1. 
What"are"the"5"main"types"of"animal"interac;ons?"
Regular"paper"
INFORMATION"
ANIMAL"INTERACTIONS"
EXAMPLES"AND"IMAGES"
16"
Biologyguy"©"
FOLDAAAAAAAAAAAAAAAAAAAAAAA"
____________,"______________,"_______________,"________________,"____________"
"
2."Look"at"the"graph"below"what"type"of"animal"interac;on"does"it"show?"_______________"
"
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ZEBRA"
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"
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LION"
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a)  What"happens"to"the"popula;on"of"the"zebra"as"the"popula;on"of"the"lion"increases?"
Explain"your"answer."
"
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________"
"
3."Produce"a"foldable"to"describe"the"5"main"types"of""animal"interac;ons.""Include"
informa;on,"examples"and"pictures."
PERFORMANCE ASSESSMENT #1: Interpreting Data
MSRLS2R1.'Analyze"and"interpret"data"to"provide"evidence"for"the"effects"of"resource"availability"on"organisms"
and"popula;ons"of"organisms"in"an"ecosystem."[Clarifica;on"Statement:"Emphasis"is"on"cause"and"effect"
rela;onships"between"resources"and"growth"of"individual"organisms"and"the"numbers"of"organisms"in"
ecosystems"during"periods"of"abundant"and"scarce"resources.]"
1."The"table"below"shows"the"popula;on"of"fresh"water"fish"and"birds"that"live"within"a"
pond"ecosystem."""The"table"also"contains"data"rela;ng"to"the"water"level"of"the"pond"
over"a"period"of"11"years."""
No."Fish"
No."Birds""
Water"
level"
(meters)"
2000"
120"
7"
6"
2001"
201"
12"
8"
2002"
180"
14"
7"
2003"
177"
15"
7.5"
2004"
111"
13"
3"
2005"
52"
5"
1"
2006"
24"
3"
0.9"
2007"
20"
3"
1"
2008"
32"
3"
3"
2009"
60"
6"
3"
2010"
74"
8"
4"
2011"
80"
7"
3"
a. 
From"which"ecosystem"was"this"data"
taken"?"
"
__________________________________"
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b."How"might"the"level"of"water"affect""
the"popula;on"of"birds?"
"
__________________________________
__________________________________"
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b."How"might"the"level"of"water"affect"the"
popula;on"fish?"
"
__________________________________
__________________________________"
2."Explain"how"the"level"of"the"pond"water"affected"the"popula;on"of"the"fish"and"birds."
Support"your"argument"with"data"from"the"table.""
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
3."What"was"the"reason"for"the"change"in"popula;on"of"the"fish"and"birds"over"the"11"year"
period?
18"
____________________________________________________________________________
____________________________________________________________________________"
Biologyguy"©"
Year"
PERFORMANCE ASSESSMENT #2: PREDICTING PATTERNS
MSRLS2R2."Construct"an"explana;on"that"predicts"pagerns"of"interac;ons"among"organisms"across"
mul;ple"ecosystems."[Clarifica;on"Statement:"Emphasis"is"on"predic;ng"consistent"pagerns"of"
interac;ons"in"different"ecosystems"in"terms"of"the"rela;onships"among"and"between"organisms"
and"abio;c"components"of"ecosystems."Examples"of"types"of"interac;ons"could"include"compe;;ve,"
predatory,"and"mutually"beneficial.]"
1."The"table"below"shows"the"popula;on"of"rabbit"and"red"fox.""Data"was"collected"
through"over"a"period"of"11"years."""
No."FOX""
(thousands)"
No."RABBIT"
(Thousands)"
2000"
33"
20"
2001"
51"
21"
2002"
12"
52"
2003"
10"
83"
2004"
12"
65"
2005"
35"
69"
2006"
14"
82"
2007"
11"
11"
2008"
6"
35"
2009"
7"
149"
2010"
66"
111"
2011"
70"
60"
a)"Create"a"graph"to"show"the""change"in"
popula;ons"of"fox"and"rabbit"over"the"11"year"
period.""See"the"example"below:"
POPULATION"(thousands)"
Year"
Year"
b)"Once"you"have"ploged"the"points"draw"a"
smooth"line"to"show"the"change"in"fox"
popula;on"and"the"change"in"rabbit"
popula;on."
20"
Biologyguy"©"
2."What"pagern"exists"in"the"popula;on"of"growth"of"the"fox"and"rabbit"over"the"11"year"
period.""Explain"your"answer"using"data"from"the"table.""
"
3."Using"the"data"provided"what"do"your"think"the"popula;on"figures"would"be"for"the"next"3"
years.""Explain"your"answer"and"support"your"argument"with"evidence.""
INTERDEPENDENT RELATIONSHIPS VOCABULARY
POPULATION: The number of organisms living in a defined area.
ORGANISM: Living things, such as animals and plants, which demonstrate life processes.
ABIOTIC FACTOR: The non living things in an ecosystem.
BIOTIC FACTOR: The living things in an ecosystem.
ECOSYSTEM: A system of living and non living things that make up your environment.
COMMUNITY: a group of organisms or a population of different species, which occupy a certain area and
interact with each other and their environment.
ENVIRONMENT: the surroundings and conditions, both living and non living in which an organism live.
PREDATOR: Organism which eats other organisms
PREDATION: type of interaction that occurs between organisms in which a predator eats prey.
PREY: organism that is eaten by a predator
COMMENSALISM type of interaction that occurs between 2 organisms in which one benefits at no cost or
expense to the other.
Parasitism: Interaction between organisms, in which only one organism benefits at the expense of the other.
Mutualism: Type of interaction between organisms where both organisms benefit.
Competition: Type of interaction between organisms where they compete for resources.
1. Create a personal dictionary to help you remember these key terms. Include word, definition, sentence and a
picture.
DEFINITION'
SENTENCE'
PICTURE'
22"
Biologyguy"©"
WORD'
INTERDEPENDENT RELATIONSHIPS QUIZ
NAME_________________"
SCORE________________"
1.  What"is"the"term"used"to"describe"a"system"of"living"and"non"living"things"that"make"up"your"
environment?"
"
A.  ECOSYSTEM""""""""""B"COMMUNITY"""""""C."ENVIRONMENT"""""""""D."BIOME""""
"
2."What"is"the"scien;fic"term"for"something"that"is"living"and"demonstrates"the"7"life"processes?"
"
A.  THING""""""""B."ECOLOGY"""""""""C."ORGANISM""""""""D."BACTERIUM"
3."What"is"the"term"used"to"describe"the"non"living"factors"that"can"affect"an"ecosystem?"
"
A.  BIOTIC""""""""B."ABIOTIC""""""""C."NON"BIOTIC"""""""D."AALIVING""
4."What"is"the"term"used"to"describe"the"living"factors"that"can"affect"an"ecosystem?"
"
A.  BIOTIC""""""""B."ABIOTIC""""""""C."NON"BIOTIC"""""""D."AALIVING""
5."A"group"of"different"species"that"live"together"and"occupy"a"certain"area"are"known"as"what?""
"
A.  POPULATION"""""B."ECOSYSTEM""""C."COMMUNITY""""""D."BIOME"
7."Humans"have"bacteria"which"live"in"their"gut.""The"bacteria"aids"diges;on."What"type"of"interac;on"is"this?"
"
A.  PREDATION""""""B."MUTUALISM""""C."COMPETITION""""""D."PARASITISM"
"
8."What"is"the"correct"name"that"is"given"to"an"organism"that"is"eaten"by"a"predator?"
"
A."VICTIM""""B."PREY""""""C."PARASITE""""
"
9."Within"an"ecosystem,"if"there"are"a"limited"supply"of"resources,"what"will"happen"to"the"organisms"in"that"
ecosystem?"
"
A."THEY"WILL"COMPETE"FOR"RESOURCES"""""B."SOME"WILL"DIE""""C."THEY"WILL"FLOURISH""""D."ANSWERS"A+B"
"
10."How"can"resources"such"as"food,"water"and"space"result"in"the"increase"and"decrease"of"a"species"
popula;on?"
"
23"
Biologyguy"©"
6."A"flea"sucking"the"blood"from"a"cat"is"an"example"of"what"type"of"animal"interac;on?"
"
A.  PREDATION""""""B."MUTUALISM"""""C."COMPETITION""""""D."PARASITISM"