Download Chapter 2 Handouts

Chapter 2: Energy Flow & Nutrient Cycles
DAY
2
3
4
5
OUTLINE
Go over Ch. 1 Test
2.1 Notes
Rootbeer Demo and Worksheet
Assignment: Do Energy Flow Vocabulary
Do Food chains, food webs, and food
pyramids wksht
Do_p.67#_5,8,12,13
Video Clip: Biosphere II
2.2 Notes (Carbon & Nitrogen Cycles)
Assignment: Do 2.2 Nitrogen Definitions wksht
Activity: Nitrogen Cycle
Assignment: Do “Nutrients” T/F wksht
2.2 Notes (Phosphorous Cycle)
Assignment: Do 2.2 Nutrient Cycles wksht (use your data
book only)
Do p.91# 4,6,7,11,14
Study for 2.1/2.2_Quiz
Ch. 2.1/2.2 Quiz
2.3 Notes fill in note outline
Assignment: Do “Bioaccumulation” wksht
Do “PCB’s and the orca
Do p.lO3# 3, 9, 20
Do Heavy metals wksht
Activity: Bioaccumulation (Simulating Toxic Effects in an
Ocean)
Chapter 2 Bingo Activity
CH.2 REVIEW: Do 2.1, 2.2 & 2.3 Assessment wkshts
Do p.104-105 #4,6,7,15,19,22,28
Study for_Ch.2_Test
Ch. 2 Test
Read p. 108-12 1 and complete Reading Check p.
111
3.1 Notes
—
6
7
1.
2.
3.
4.
5.
KEY TERMS
Decomposers
Food Chains
Food Webs
Food Pyramid
Trophic Level
6. Nutrients
7. Carbonate
8. Cellular
Respiration
9. Photosynthesis
10. Nitrification
11. Denitrification
12. Biodegradation
13. Heavy Metals
14. PCB’s
15. Pesticides
16. Bioaccumulation
17. Keystone Species
1. Adaptive radiation
2. Natural selection
Chapter 2: Energy Flow & Nutrient Cycles Key Terms
Key Term
Decomposers
2. Food Chains
3. Food Webs
4. Carbonate
Trophic Level
6. Food Pyramid
7. Nitrification
8. Denitrification
Defin1ion
Examp’e/Graphic
Key Term
9. Cellular Respiration
Definition
Example/Graphic
10. Photosynthesis
11. Nutrients
12. Biodegradation
13. Heavy Metals
(;
14. PCB’s
15. Pesticides
16. Bioaccumulation
17. Keystone Species
2.1 Energy Flow in Ecosystems Student Notes
-
the total mass of all living things in a given area. (measured in
g/m2 or kg/m2)
•
Organisms interact with the ecosystem by:
1.
2.
•
from the ecosystem
Contributing__________________ to the ecosystem
Obtaining
Plants are called
during photosynthesis.
2
CO
+
0
2
H
because they make
+
•
sunlight —>
get
•
12
H
C
6
0
+02
their energy by feeding on producers or other consumers,
breakdown wastes
&
dead organisms, through the process of
biodegradation.
EnerEy Flow and Energy Loss in Ecosystems
•
Methods to represent
moving
show the flow of energy in an ecosystem.
—
—
—
through ecosystems.
represent interconnected food chains. They model the
feeding relationships in an ecosystem
show the changes in available energy from one
level to another in a food chain, They’re also called ecological pyramids
trophic
Food Chains
‘1fiar
Each step is a trophic level
flrflC5
=
1St trophic level
=
2nd trophic level
—
—
=
3rd trophic level
=
4th trophic level
Terreshal load chain
)
\ç,
Aquaticlood diain
Consumers in a food chain can be classified as:
1.
obtain energy & nutrients from dead
organisms & waste matter.
• they have their own, separate food chains & they feed on every trophic level.
• Eg. small insects, earthworms, bacteria & fungi
-
2.
-
•
•
3.
primary consumers
eat plants (producers) only
Ex. Horse eating hay
secondary or tertiary consumers
consumers eat non-producers (herbivores)
Eg. Frog eating a grasshopper
consumers eat secondary consumers
also called top predators, top carnivores or top consumers
Eg. Lions eating humans
-
•
-
4.
consumers that eat both plants & animals
Eg. include humans and bears
-
Food Webs
Most organisms are part of many food chains.
Arrows in a
represent the
nutrients.
Following the arrows leads to the top carnivore(s),
—
and
—
Food Pyramids
Energy enters at the first tropic level
(producers), where there is a large
amount of__________________ &
therefore a lot of energy
E’sbst
asheat
It takes large quantities of organisms in one tropic level to meet the energy needs of the next
trophic level.
•
80% 90% of energy taken in by consumers is used in chemical reactions in the body, or is lost
as heat energy.
• The amount of life an ecosystem can sustain is based on the bottom level of the ecological
pyramid, where producers capture energy from the sun.
•
have much larger populations than
•This shows the hnpartance of maintaining large,
at the
lowest levels of the food pyramid.
•
-
6. Why cant a food chain have an infinite number of links?
5. What consumer has to eat the most food to meet its energy needs?
4. How much “energy” was USED by the insect? What was this energy used for?
3. What happened to the 180 milliliters from the plants that the caterpillar didn’t absorb?
2. Which trophic level received the least “energy”?
1. Which trophic level received the most energy?
Questions:
-
2. Label the following on your food chain.
prøducer, primary consumer, secondary consumer, tertiary consumer,
decomposei, herbivore, omnivore, carnivore, top carnivore, first trophic level, second
trophic level, third trophic level, fourth trophic level
I. Create a food chain using the following organisms. Be sure to include arrows to show
the direction of energy flow.
sun, hawk, bacteria, plant, sparrow, caterpillar
Rootbeer Activity: Energy Transfer in Ecosystems
toad webs
photoda
primaiy cotisurners
nay pm&ers
seconday consumers
teay consumers
refers to the total mass of living plants, animals, fungi, and
bacteria in a given area.
is
called
is the breaking down of organic wastes and dead organisms.
are models that show the flow of energy from plant to animal
level.
and from animal to animal. Each step is called a
change waste and dead organisms into usable nutrients.
16
12.
MHR • Section 2.1
Energy How in
Ecosystems
• 2008 McGraw4 Ryesen Unilted
are models of the feeding relationships within an ecosystem.
the loss of energy from one trophic level to another.
that feed on secondary
obtain their energy from primary producers.
their energy by eating primary consumers..
11. In the fourth trophic level are
consumers to obtain energy.
10.
9. Plants and phytoplankton, such as algae, are at the first trophic level and are referred
toas
8.
7.
6. The action of living organisms, such as bacteria, to break down organic matter is
called_________
5.
4. An insect, such as a bee, that feeds on a plant is called a
3. Plants are called producers because they “produce” food in the form of
carbohydrates during
another
2. The flow of energy from an ecosystem to an organism and from one. organism to
1.
Use terms in the vocabulary box to fill In the blanks. Use each terni only once.
biodegradatimi
biomaos
consumer
decotosers
decomposition
energy 1km
food chaiis
food pyramids
Vocabulary
Energy flow
Use with textbook pages 56-64.
oper
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Aq005rC food drahi
erg
EZ..E1
7
200$ MoGrew-H5 nyereon
foodweb
Tonest,toi food chata
=Js.°
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gr
,ed4ated hawk
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Seclion 21
Energy Flow In Ecesystemo • MHR
6. Gob two emrniplas at defrinores.
5. What kind of consumers do omnlvores eat?
4.Whettermisussdtadsscribeachiprnunkthateats
seeds or tritt?
17
3. What. do teiltary consumers feed on to obtain energQ
2. What trophic level do the htsgs and crabs belong to?
I. What plants or animals are the primary producers in
iNs food chain?
food ctain
‘1I_
Questions
Scientific model
Use he diagrams to help you answer the questions.
Food chains, food webs, and food pyramids
Use muff fexUrsok pages 60-64.
18
MHR • Section 2.1
food pyramid
grassos
long.taiiod
Energy Flow in Eoesysteme
,,‘
great homed
& energy?
9. Witch level of a iotd pyramid slants the least amount
8. Which level of a food pyramid stores the moat
7. What is a food pyramid?
Carbon Cycle:
-
-
-+
done by bactoia/flmgi
÷
(in cells of all living things)
+ENERGY
-
the world
-____________________________ moves
into the air.
and
equator
evaporates
to
the
warm
flows
-1
waters
ocean
cold
sinks
in
2
CO
4. Ocean Processes:
and_________ of the land,
Lone-term Stores
-underground (oil, gas, natural gas and coal)
sedimentary rock (limestone)
ocean floor (old thells)
(in plants algae and cyanobacteria)
+sunliglt—*
Short-term Stores
living things in water & on land
rotting tissm of plants/animals
atmosjlhere (air)
ocean (dissolved in the water)
is found in all living matter.
Places that carbon is found are called
cellulose 4
3.
-
Carbon, Nitrogen, Phosphorous, Hydrogen and Oxygen
(energy is used for growth, repair etc.)
2.
I.
the flow of nutrients
The he1th of our ecosystems depends on the balance of:
B. flow Carbon Changes Form:
-
-
•
-
•
•
—
ocean, unosphere and deep rock.
A. Carbon Pacts:
•
____
2.2 Nutrient Cycles in Ecosystems Student Notes
_______
______
_+____
_________
___________
__around
____— ________or
___________
___________
_________________________________
__
________
___________
___________
+_________
+
___________
___________
___________
___________
___________
-
•
dianges
Rain washes
Lightning
soil. (small amount)
4
in soil (thizobium)&__________________ in water change
(more)
2. Nitrification (done by nitrifvin bacteria’:
•
•
4
is not usable by plants or animals, so it has to he converted to other forms.
and______________________
Plants can use
1. Nitrogen Fixation
-
B. How Nitrogen Changes Form:
Where Nitrogen is Found
Atmosphere (78% is
• Oceans
• Organic matter in soil
• Lakes, marshes, organisms
Nitrogen Cycle:
A. Nitrogen Facts
• Makes up__________________________ (muscle fimction).
• Help plants grmv
is released
in atmosphere has increased 30% in past 160 years.
In the 160,000 years before that, it only increased l-3°/.
is removed from long-term storage as we mine coal & drill
fbr oil and gas.
2 is also a
CO
,(traps heat in atmosphere)
ENERGY
(burning, engines, volcanoes, forest fires)
2. Removing Trees
so then they are cut down,
• Trees absorb
into the air.
2
• Other crops don’t remove as much CO
•
•
•
•
Human Activities & çQ
1. Burning Fossil Fuels
-*
fossil fi2els +
(oil, gas, natural gas, coal)
5.
&
In animals, phosphorous is important for
•
B. How lhosphorous Changes Form.
Where Phosplomus is Found:
• Not in atmosphere, but in
anl sediments on the ocean floor.
Phpsphorous helps
cels_________
stem
is a part ofthe molecule that canies
Phosphorus Cyclet
•
•
Phosphorota facts
seed
use up all________ &
These
sunlight &produce neurotoxins which poisctl and kill many aquatic organisms.
leach into soil & waterways.
•
&
burning.
acid rain is fr,rmed which contains nric acid (HNO3).
are byproducts
huge growth in aquatic algae
.
NO &
& sewage treatment.
•
•
3.
2.
I.
C. Human activities affect the nitrogen cycle.
The amount ofnitrogen in the ecosystem has doubled in 50y. due to:
->__________
4. Denitrfication (done by
is sucked into plants & used for growth. Herbivores eat plants & use
making protáns &
3. Uptake;
,block
for
phosphorous is rurned to soil.
runs into i’mterways.
4 climate change & global wanning.
,H, 0,
ash, which
(important prodtEers).
3. Decreased levels of__________________ 4 slow growth of algae
2. Too much____________________ can allow certain plant species to out-compete other
species.
1.
To Review:
Any significant changes to any of these nutrients (
turns
irEreases_ in ecosystems quickly.
orP) can greatly impact
when rocks under the ground are
Bacteria break down organicmatter &
plants aick up P043-, then are eaten by animals.
How Chanaes in Nutrient Cycles Affect Biodiversity
2.
I.
down rock into smaller pieces).
• acid rain or lichens releases
b) Physical weathering:
• wind, water and freezing release the_______________________
a) Chemical weathering:
C. Human activities affect the Phosphorous Cycle.
4.
3.
2.
1.
Term
4
NH
2
N
2
NO
3
NO
nitrate
Certain bacteria that convert ammonium into nitrite or nitrite Into
The process where nitrates enter plant roots
The process where nitrates are converted into nitrogen gas
lightning
Nitrogen gas is converted into nitrate using electrical energy from
Certain bacteria that convert nitrate back into nitrogen gas
Provide for the host plant and in return obtain sugars
The process of making nitrates
Definftion
Nitrogen fixation, denitrificatlon, nitrifying bacteria, nitrate, nitrogen uptake, nitrification,
ammonium, denitrifying bacteria, nitrite, nitrogen-fixing bacteria, nitrogen
Match the following words with their definitions:
Nitrogen
Use with textbook pages 78-83
‘
Use this page to check your understanding of nutrients.
rutIt True or False
Ni,Mt,
ClASS
‘vVhlIc a pyramid of numbers or biornass can be inverted, a pyramid of energy cannot.
9.
Carnivores are organisms that eat plant material.
In a food chain, a deer feeding off leaves would be a secondary consumer.
Carrying capacity is the largest number of organisms that can survive in an area.
There is a loss of energy at each trophic level.
Green plants occupy the second trophic level in food chains.
The process of nitrogen fixation uses oxygen to produce carbon dioxide.
—
—
—
Decomposers are a very important part of every nutrient cycle.
Green plants add carbon dioxide to our atmosphere through a process of
photosynthesis.
—
8.
7.
6.
5.
4.
3.
2.
1.
Beside each statement below, write the letter T if you think the statement is true or F if you
think it is uidse. If you think the statement is false, write the correct sentence in the space
provided.
Goal
DA1t
Block:_______
Name:
Date:
2.2 Nutrient Cycles
Science 10
Assignment
(20 marks)
Use the nutrient cycle pages of
1.
your data booklet to
answer the following questions:
Name the process that cycles carbon from an abiotic source in the atmosphere to a biotic source in
plants
2.
Name 3 ways that
humans
affect the nitrogen cycle.
a,
b.
C.
3.
4.
5.
What is the greatest store of carbon?
How much carbon is put into the atmosphere each year by fossil fuel combustion?
Overall, is carbon being added or taken away from the atmosphere by the processes of plant
growth and decay?
6.
How much phosphorous flows
7. Name 2
through the cycle from fertilizer use?
ways phosphorous is released from rocks.
b.
8. What do we
9.
call the process by which nutrients enter waterways?
What organism has
a symbiotic relationship with nitrogen fixing bacteria?
10. Which molecule is the product of nitrogen
11. Which molecule is
fixation?
the product of denitrification?
12. Name 2 ways that nitrogen fixation occur.
a.
b.
13. Which process do all plants
14.
What is
15.
What are
a.
b.
and animals
do that returns
the primary form of nitrogen in the
the two
forms of
carbon to
atmosphere?
nitrogen that plants can use?
the
atmosphere?
2.3 Effect of Bioaccumulation on Ecosystems
>
Amphibians are valuable
—
Student Notes
of environmental health because
they’re sensitive to chemical changes.
>
Since the 80s the world amphibian population has
& birth deformities
have
> This may be due to:
habitat
increased UV rays,
loss,
/
: a slow build up of chemicals in the bodies of
organisms.
•
-
it can affect every other
If bioaccumulation occurs in a
organism in its far reaching
Eg. Bioaccumulation of PCBs in the B.C. Orcas.
• PCBs will affect the reproductive cycles of Orcas until at least 2030,
banned in ‘77.
> Chemicals like
and
even though they were
other insecticides are called
& remain in water & soil for many years
(like all organic comp)
even at low levels (5
causes nervous, immune &
reproductive system disorders in animals. [ppm = parts per millionj
•
also
Lead, cadmium & mercury are the most dangerous.
is not considered safe at any level, it can cause anemia, nervous
& reproductive system damage.
is toxic to earthworms & causes many health problems in
fish.
• Cadmium causes
in humans (exposure to cigarette smoke),
•
•
>
enters ecosystems through burning of fossil fuels, waste incineration,
mining & the manufacture of batteries.
• Coal burning adds
of the mercury released.
• Mercury__________________________ in the brain, heart & kidneys of many animals
(Fish
mercury, adding risk for any organisms eating fish).
> Reducing the effects of chemical pollution
• If chemicals are trapped in the soil, they cannot enter the
as
easily.
micro-organisms or plants are used to help clean up,
and are then removed from the ecosystem.
Eg. The oil industry will often use bacteria to “eat” oil spills.
>
the consumers in each
doses of accumulated chemicals than the one before it.
receive larger
The bioaccumulation of PCBs begins with the absorption of the chemicals by microscopic plants
and algae.
producers
each terni oniy once.
is the
process
trophic levels.
are
synthetic chemicals
remain n water and soil for many years.
Section 2.3
and
Effects of Bicaccumulation on Ecosystems
MHR
i the use of living organisms to clean
biodegradation.
up chemical pollution naturally, only faster, through
02008 McGraW-Hill Ryorson Limited
11.
that
are metallic elements with a high density
that ar toxic to organisms at low concentrations.
10. Three polluting heavy metals am_____________
9.
are carbon-containing compounds
amount of a
that were widely
up to cause problems in higher
and primary and secondary consumers can build
Even small concentrations of chemicals in
pyramid.
8. Chemiqal accumulation is measured in
7.
affect
chemicals
greatly
which
can
at each tropic level in a food
not only accumulate but become more concentrated
in
are species that
is the gradual build-up of synthetic and
and the heafth of an ecosystem.
in living organisms.
vocabulary box to fill In the blanks. Use
numbers
chemicals
populaton
organic
milton
persistent organic pollutants
PCBs
mercury
parts per
lead
used frpm the 1930s to the 1970s in industrial products.
is the time it takes for the
6.
half.
by
decrease
chemical to
5.
4.
3,
2.
1.
Use the tetans in the
heavy metals
keystone speoles
halt-lie
cadmium
bia-enieciiatloØ
bloaccumulatlen
biomagnhuication
Vocabulary
Dioaccumujafion
Use wttlr textbook pages 92-99
_____
_____
_____
___
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
_____
___
___
___
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
___________
chemical
name?
36
6.
5.
have on
02008 McGrew.H01 Ryorson United
occurs in, orcas.
What effect does this
Effects of Bioaocumulation on Ecosystems
diagram to illustrate how biomagnification
survive when salmon stocks are low?
MHR • SectIon 2.3
Draw a
How do oroas
their survival?
4. Explain what happens to PC8s when they enter an orca’s body.
3. In North Amotica, PCBs were banned in 1977.
Explain why they are still having an effect on
organisms today.
2. What were PCBs used for in the 1970s?
1. What are PCBs? What is their full
PCOs and the orca
Use with textbook page 95.
Mercury
Cadmium
Lead
the student book.
you read pages 97—98 oF
Complete the template as
ects on Humans
Effects on Organisms Eff
Environmental Sources
Metal
What to Do
vy metals.
rd what you learn about hea
Goal • Use this page to reco
Heavy Metals
clasa
with the best
A. a model that shows
nthesis supplies
ng organisms are
11. Which of the followi
the third trophic level
in
nd
fou
be
to
ly
like
in?
cha
food
of a
C. grasshopper
A. algae
0. hawk
B. frog
describes the
ng
12. Which of the followi
B. carbon dioxide
C. oxygen
D. water
energy for life forms?
A. carbohydraics
10. What product of photosy
Assessment
20
MHR • Section 2.1
usually:
A. amphibians
B. bacteria
Energy Flow In Ecosystems
C. mammals
0. plants
d
o zoos McGrev-HW Ryerson Limits
number of org
ecosystem increases
the flow of energy from
plant ID animal and
from animal to animal
8. organisms that pro
n?
duce food In the form
process of biodegradatio
of carbohydrates dur
esis to create
nth
tosy
pho
g
s
usin
thesi
ts
osyn
A. plan
ing phot
of
n
dow
king
d
foo
C. the brea
plants
dead organic matter
primary consumers eating
B.
as
s,
such
by organism
organic matter
C. bacteria breaking down
bacteria
chain
and animals
0. steps In a food
0. omnivores eating plants
•
that show feeding and
how much energy is lost
niche relationships
• 13. tn a food pyramid,
hic level?
among organisms
from trophic level to trop
E. a model that shows the
C.70%
A.20%
lass of energy from one
0.90%
trophic level to another
8.50%
F. an organism that eats
14. In a food pyramid:
other organisms
reases, the
ing
feed
the
of
el
mod
6. a
A. as the trophic level dec ported by the
relaltonsliips withIn an
number of organisms sup
em
ecosystem decreases
H. organisms that break
eases, the number
B. as (he Irophic level incr the ecosystem
down wastes and dead
ported by
sup
ms
anis
org
of
ge
chan
and
organisms
increases
them into usable nutri
eases, the number
ents
C. as the tropllic level incr the ecosystem
ted by
por
sup
ms
anis
org
of
best answer.
decreases
Circle the letter of the
are
reases, the
ers
duc
pro
ary
prim
0. as the trophic level dec ported by the
9. In a food chain,
anisms sup
biodegradation
I.
2._consumers
3. _decomposers
4.__ food chain
food pyramid
5.
food web
6.
7._producers
trophlc levels
8.
be used once.
Match each Term on the Mt
riptor may only
Descriptor on the right. Each Desc
Entrgy flow in
ecosysttms
Use wfth textbook pages 5644.
Name
Date
—
clenhtrilication
fltriication
nfitmients
photosynthesis
__sedtmentatlon
weathering
vetted into nitrate
F. (he process in which
plants and animals
release carbon dioxide
back into the atmo
sphere by converting
carbohydrates and oxy
gen into carbon dioxide
and water.
G. the process in which
soil particies and
decaying organic mat
ter accumulate In layer
on the ground or at the
bottom of large bodies
of water
ammonium Is con-
E. the process in which
oxygen
A. the process in which
nitragen is released
into the atmosphere
B. substances, such as
nitrogen and phospho
rtis, that are required
by plants and animaLs
for energy, growth,
development, repair,
and maintenance
C. 11w process In which
rock Is broken into
smaller fragments
D.apracess in which
carbon dioxide enters
plants and reacts with
water in the presence
ot sunlight to produce
carbohydrates and
02008 McGraw-Hi Rysrson Llctted
4.
5.
6.
7.
3.
2.
respirallon
1. __cplular
Matclneach Term on the left with the best
DescrIptor on the right. Each Descriptor maybe
used only once.
Use with texjboak pages 68-87.
Nutrient cycles in
ecosystems
Name
Assessment
Nutrient Cycles in Ecosystems • MHI1
D. releases nitrogen into the soil
29
C. fixes carbon dioxide in the atmosphere
B. fixes nitrogen in the atmosphere
A. absorbs energy into land masses
ia Lightning provides energy that:
V. ammonia being converted into
carbohydrates
C. nitrogen gas being converted into nitrate
or ammoniumit
B. nitrates being consumed by bacteria
A. ammoniuni being converted into nitrates
11. Nitrogen fixation results in:
C. nitrogen
D. phosphorus
B. oxygen
A. carbon
10. Which of the following is not stored in the
atmosphere as a gas?
V. volcanic ash
C. algae
B. terrestrial organisms
A. marine organisms
9. calcIum carbonate is a slructriral
component of:
D. soil and organic matter
C. oil and gas deposits
B. marine sediments and sedimentary rocks
A. terrestrial vegetation
8. In the carbon cycle, where are the highest
stores of carbon found?
Circle the letter of the best answer.
Section 2.2
Date
of the best answer.
02008
MsGrsw-HC Ryersan tjmilsd
0. buildIng of hydro plants
Section 2.3
C. introduction of synthetic chemicals
B. forest fires
A. recycling
environment?
V. bioremediation
C. bioniagnificalion
B. biodiversity
A. bioaccumulation
•
MFan
12. The process by which microorganisms
break down chemical pollutanls to lessen
environmental damage is known as:
0. do degrade and can not be recycled
C. do degrade and can be recycled
B. (to not degrade and can be destroyed
37
A. do not degrade and cannot be destroyed
11. Within the biosphere, heavy metals:
V. pesticides
C. tobacco smoke
B. water pollution
A. air pollution
cadmium poisoning is exposure 10:
10. For humans, the most serious source of
0. nitrogen
C. phosphorus
B. carbon
A. oxygen
9. POPs. or persistent organic pollutants, are
compounds that contain:
0. salmon
C. pine trees
B. fungi
A. bacteria
8. Which of the following would be identified
ps a keystone species in the BC forest
ecosystem?
Assessment
Effects of Bioaccumutatton on Ecosystems
Date
7. Over the last century, which human activity
has caused the greatest change to the
Circle the letter
1.bioaccuceiaflon A. synthetic chemicals
containing chlorine
2._ bioremedlalion
heavy metals
that are used hi the
3.
manufacture of plastics
4._ keystone
species
and other industrial
products
5._ parts per million
6._ PCBs
B. species that can
greatly affect popula
tion numbers and the
health of an ecosystem
C. a measraement of
chemical accunitfiation
0. the use organisms to
clewa demn
cat potutants in waler
or soil to rerse or
lessen environmental
damage
E. metallic elements with
a high density that are
toxic to organisms at
low concentrations
F. the gradual build-up of
synthetic and organic
chemicals in living
organisms
Match each Term on the left with the best
Descriptor on the right Each Descriptor may be
used only once.
Use with textbook pages 92—99.
Effects of biaaccumula
tion on ecosystems
Name