biology monday 20 mar 2017 - steilacoom...2017/03/20 · organisms. • food chains are simple, but...
TRANSCRIPT
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BIOLOGY
Monday
20 Mar 2017
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Entry TaskWhat is the ultimate source of energy for most all life on Earth?
• The Sun
What are the two types of autotrophs? Explain where the energy
for each comes from.
• Photosynthesis = from the energy in sunlight.
• Chemosynthesis = from the chemical bonds in organic
molecules.
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Agenda Housekeeping
Consumers
Food Chains & Food Webs
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HousekeepingSubstitute on Wednesday & Thursday (22-23 Mar).
• POGIL - Ecological Pyramids
• Ecological Pyramid Foldable
Substitute on Monday, 27 Mar.
• POGIL - Nutrient Cycles
Substitute Wednesday through Friday (29-31 Mar.)
• Quarter 3 ends
• Early release schedule
• Chpt 3 workbook
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Chpt 3 Objectives
You will be able to answer the following questions.
• How do consumers obtain energy & nutrients?
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Consumers
Heterotrophs: must acquire energy from other organisms.
Consumers:
• Organisms that rely on other organisms for energy and
nutrients.
• Classified by the ways they acquire energy & nutrients.
- Carnivores - Decomposers
- Herbivores - Detritivores
- Omnivores - Scavengers
p. 71
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Consumers
Consumer classifications.
Carnivores
• Captures, kills, & eats other animals.
• Requires energy, but meat is generally rich in nutrients &
energy, & easy to digest.
Herbivores
• Obtains energy and nutrients from eating plant leaves, roots,
seeds, or fruits.
p. 71
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Consumers
Consumer classifications.
Omnivores
• Diet naturally includes a variety of different foods.
• Foods usually include both plants & animals.
Decomposers
• Bacteria & fungi that “feed” by chemically breaking down
organic matter.
• The decay process produces detritus, small particles of dead
& decaying plant & animal remains.
p. 71
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Consumers
Consumer classifications.
Detritivores
• Feed on detritus, often grinding them into even smaller
pieces.
• Commonly digesting decomposers that live on, & in, particles.
Scavengers
• Consume the carcasses of other animals that have been
killed by predators or have died of other causes
p. 71
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Consumers
Consumer classifications.
• These simple categories often do not express the real
complexity of nature.
• E.g. hyenas are often described as carnivores, but will
scavenge if necessary.
p. 72
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Consumers
Identify each
color as either
a primary
producer or
one of the 6
consumers.
p. 71
Primary Producer
Carnivore
Herbivore
Omnivore
Detritivore
Decomposers
Scavengers
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Consumers
Identify each
color as either
a primary
producer or
one of the 6
consumers.
p. 71
Primary Producer
Carnivore
Herbivore
Omnivore
Detritivore
Decomposers
Scavengers
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Check on Learning
How do primary producers make energy-rich compounds?
• Photosynthesis
• Chemosynthesis
How do consumers get the energy they need to survive?
• Eating other organisms
What are some different categories of consumers?
- Carnivores - Decomposers
- Herbivores - Detritivores
- Omnivores - Scavengersp. 69-71
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BIOLOGY
Tuesday
21 Mar 2017
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Entry TaskAll organisms can be classified
another? Explain.
• Simple consumer classifications
often do not express the real
complexity of nature.
All organisms can be classified as one type of consumer or
another? Explain.
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Agenda Housekeeping
Food Chains & Food Webs
Food Web Manipulative
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HousekeepingSubstitute tomorrow & Thursday (22-23 Mar).
• POGIL - Ecological Pyramids
• Ecological Pyramid Foldable
Substitute on Monday, 27 Mar.
• POGIL - Nutrient Cycles
Substitute Wednesday through Friday (29-31 Mar.)
• Quarter 3 ends
• Early release schedule
• Chpt 3 workbook
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Chpt 3 Objectives
You will be able to answer the following questions.
• How do consumers obtain energy & nutrients?
• What are the different types of ecological pyramids?
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Interdependence
What does interdependence mean?
• Inter- means “between or among”
What things in your life are interdependent?
p. 73
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Food Chains
How does energy flow through ecosystems?
• Energy flows through an ecosystem in a one-way stream,
from primary producer to various consumers.
p. 73
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Food Chains
p. 73
Food Chain:
• A series of steps in which organisms transfer energy by eating
or being eaten.
• The of links (steps) determine how far a consumer is removed
from a primary producer.
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Food Web
Food Web:
• A network of complex
interactions formed by the
feeding relationships among
various organisms in an
ecosystem.
• Consists of multiple food
chains linked together.
• Decomposers & detritivores
return nutrients back into the
system.p. 74-75
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Food Web
Why is a food web a more accurate representation of the
feeding relationships in an ecosystem than a food chain?
• Organisms are rarely food or feed on just one other
organisms.
• Food chains are simple, but feeding interactions are rather
complex.
• Many different feeding relationships exist between organisms
in an ecosystem.
p. 74-76
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Food Chains & Food Webs
Why might scientists study feeding relationships using a model,
such as a food chain or food web?
• Feeding relationships may be difficult to observe, & it may be
unethical to experiment with them.
What type of predictions could be made using a food chain or
food web?
• A food web could be used to predict what would happen if a
certain population in an ecosystem increased or decreased in
size.
p. 74-76
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Food Web
Complexity of food webs & disturbances:
p. 76
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Disturbances
How might an increase in the herring population affect the
emperor penguin population?
• Emperor penguins eat herring. An increase in the emperor
penguin’s food source would likely lead to increase in their
population.
Suppose the killer whale population is significantly reduced by
disease. How might this affect the leopard seal population?
• A decrease in the killer whale population might lead to an
increase in the leopard seal population, because killer whales
a leopard seal’s only predator.
p. 74-76
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Food Web Manipulative
Food Web Manipulative:
• In your groups, organize the cards so they demonstrate the
correct feeding interactions.
• When you believe you have the correct feeding interactions,
draw or sketch the web on the worksheet.
When directed switch sets with another group:
• Even numbers with even numbers, odd with odd.
• Redo steps above.
p. 73-76
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Check on Learning
What do we call a complex interaction of feeding relationships?
• Food webs.
p. 73-76
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BIOLOGY
Wednesday
22 Mar 2017
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Guest TeacherProcess Oriented Guided Inquiry Learning:
• Ecological Pyramids.
Instructions:
• You will work in your groups; do not go beyond stop signs
without the rest of your group.
• Designate 1 representative to seek assistance from another
group 1st if you get stuck, then the teacher.
Note: POGIL - Ecological Pyramids worksheet can be located
@ http://www.steilacoom.k12.wa.us/Page/5716
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BIOLOGY
Thursday
23 Mar 2017
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Guest TeacherProcess Oriented Guided Inquiry Learning:
• Ecological Pyramids.
Instructions:
• You will work in your groups; do not go beyond stop signs
without the rest of your group.
• Designate 1 representative to seek assistance from another
group 1st if you get stuck, then the teacher.
Note: POGIL - Ecological Pyramids worksheet can be located
@ http://www.steilacoom.k12.wa.us/Page/5716
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Guest TeacherEcological Pyramid Foldable
Instructions:
• Complete all three sides of the ecological pyramid foldable
according to the rubric.
• Example taped to the front dry erase board.
Note: Ecological Pyramid Foldable worksheet can be located @
http://www.steilacoom.k12.wa.us/Page/5716
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BIOLOGY
Friday
24 Mar 2017
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Entry TaskWhat are the three types of ecological pyramids? What is
represented by each pyramid?
• Pyramid of energy
• Pyramid of biomass
• Pyramid of numbers
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Agenda Housekeeping
Ecological Pyramids
Complete Asssignments
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HousekeepingSubstitute on Monday, 27 Mar.
• POGIL - Nutrient Cycles
Substitute Wednesday through Friday (29-31 Mar.)
• Quarter 3 ends
• Early release schedule
• Spirit Week
• Parent Conferences
• Chpt 3 workbook
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Pride WeekThese are the themes for next week (27-31 Mar).
Monday = College Gear Day
Tuesday = Mathletes vs Athletes
Wednesday = Warrior Wednesday
Thursday = Hero vs Villain
Friday = Class Color Day
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Ecological Pyramids
Trophic level = each step of a food chain or food web.
• Represented by ecological pyramids, showing the relative
amount of energy or matter contained within each level.
There are 3 types of ecological pyramids:
• Pyramid of energy
• Pyramid of biomass
• Pyramid of numbers
p. 77
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Ecological Pyramids
p. 77
Pyramids of energy
• Show the relative amount of
level.
• Generally only 10% of the
available energy makes it to the
next trophic level.
Pyramids of energy:
• Show the relative amount of energy available at each trophic
level.
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Ecological Pyramids
p. 78
Pyramids of biomass
• Illustrates the relative amount available
at each trophic level.
• Measured in grams of organic matter
per unit area.
• Determined in part by the amount of
energy available.
Pyramids of biomass:
• Illustrates the relative amount of living organic matter
available at each trophic level in an ecosystem.
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Ecological Pyramids
p. 78
Pyramids of biomass
• Illustrates the relative amount
available at each trophic level.
• Consumers may be much less
numerous than the organisms they
feed upon.
- In such cases, pyramid may be
turned upside down.
Pyramids of numbers:
• Shows the relative number of individuals at each trophic level
in an ecosystem.
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Check on Learning
What are the different ecological pyramids? Explain each in 6
words or less.
• Pyramid of Energy
• Pyramid of Biomass
• Pyramid of Numbers
How much energy moves up the pyramid of energy?
• Generally 10% of the total energy.
What can occur to a pyramid of numbers?
• Can be turned upside down.p. 69-71
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POGILProcess Oriented Guided Inquiry Learning:
• Ecological Pyramids.
Instructions:
• You will work in your groups; do not go beyond stop signs
without the rest of your group.
• Designate 1 representative to seek assistance from another
group 1st if you get stuck, then the teacher.
Note: POGIL - Ecological Pyramids worksheet can be located
@ http://www.steilacoom.k12.wa.us/Page/5716
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Pyramid FoldableEcological Pyramid Foldable
Instructions:
• Complete all three sides of the ecological pyramid foldable
according to the rubric.
• Example taped to the front dry erase board.
Note: Ecological Pyramid Foldable worksheet can be located @
http://www.steilacoom.k12.wa.us/Page/5716