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Monday, November 28th Pg. 60 RTW: How has SONAR helped our understanding of the Plate Tectonic theory? Objective: I will be able to describe how the invention of sonar contributed to an advanced knowledge of the ocean bottom. Agenda: Plate Tectonic Notes pg. 57/59 Homework: None
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Geology & The Sea Floor
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Plate Tectonic World Map
Plate Tectonics- An Introduction
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Lithosphere-solid part of Earth (upper mantle and crust)
Hydrosphere-liquid part of Earth Coastlines, water depth & sediment type are affected by the constant movement of continents and rocks
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World Ocean 4 Basins Pacific Atlantic Indian Arctic
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Layers of Earth The Core- innermost iron rich layer-a solid inner & a liquid outer Movement of liquid produces the Earth’s magnetic field The Mantle- outermost solid layer Extremely hot Boiling point for rock Flows like liquid but very slow
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Layers of Earth Crust= thin skin like layer, uppermost layer of the earth Oceanic Crust 3 miles thick Sea floor Basalt- a dark colored mineral Denser Continental Crust 10-30 miles thick Granite- a light colored mineral **Think of continental & oceanic crust floating on mantle like icebergs
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Continental Crust- land
Continental Shelf- gradual decline Continental Slope- sharp decline Continental Rise- levels out to meet sea floor Abyssal Plain/Deep Ocean
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Narrow Shelf Wide Shelf
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1950’s-1960’s- evidence was found & called Plate Tectonics
Alfred Wegener 1912- Continental drift was proposed 1950’s-1960’s- evidence was found & called Plate Tectonics Geologic change is CONSTANT Fossil, coal deposits, etc is evidence of joined continents. This large land mass is known as Pangaea
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Key Scientists in Plate Tectonics
Alfred Wegener- Proposed the continental drift theory Eduard Suess- Proposed Gondowanaland Harry Hess & Robert S. Dietz- Proposed seafloor spreading
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Tuesday, November 29th Pg. 60 RTW: What is seafloor spreading and what is one place it occurs? Objective: I will be able to describe how the invention of sonar contributed to an advanced knowledge of the ocean bottom. Agenda: Read, jot down notes, and answer questions. Homework: None
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Today’s Assignment (show me when done!)
Visit this site: Science/6/The-Origins-of-Plate-Tectonic-Theory/65 Read through ALL the sections, jot down notes (pg. 54), and answer questions to test your comprehension while you are reading. When done with reading all the sections scroll back to the top and click “Quiz” and complete all the questions to the best of your ability.
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Pg. 60 RTW: Name one abiotic and one biotic thing in the room.
Wednesday, November 30th Pg. 60 RTW: Name one abiotic and one biotic thing in the room. Objective: I will be able to describe the abiotic factors and label the following areas of the marine environment: Photic and aphotic Benthic (littoral, shelf, bathyal, abyssal, hadal) Pelagic (oceanic and nertic) Agenda Layers of the Ocean Project Begin research & start putting information on your poster Homework None
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An ecosystem includes both biotic and abiotic factors.
Biotic factors are living things. plants animals fungi bacteria plants
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Abiotic factors are nonliving things.
moisture temperature wind sunlight soil moisture sunlight
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Zones of the Ocean You will be assigned into one of the following ocean zones: Supralittoral Littoral Sublittoral Oceanic Photic Oceanic Dysphotic Neritic Abyssal (Benthic) Group’s choice
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You will research: What the zone encompasses Why it is named this
Where it is, depth, etc. Why it is named this Definition and any Greek or Latin roots Abiotic factors in your zone Environmental factors Biotic factors in your zone Living factors Adaptations for this zone How have organisms adapted to the environment?
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What your poster should look like:
______ Zone Information: This zone encompasses _____ part(s) of the ocean This zone is named this after the Greek word ____ which means ____ Organisms need to be adapted in these ways to survive in this zone… Biotic Factors: Abiotic Factors: Blue-ringed octopus: biotic Light: abiotic Parrot fish: biotic
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Pg. 60 RTW: How does light (abiotic) affect organisms (biotic)?
Thursday, December 1st Pg. 60 RTW: How does light (abiotic) affect organisms (biotic)? Objective: I will be able to describe the abiotic factors and label the following areas of the marine environment: Photic and aphotic Benthic (littoral, shelf, bathyal, abyssal, hadal) Pelagic (oceanic and nertic) Agenda Layers of the Ocean Project Finish putting information on your poster Gallery Walk (pg. 61) Homework None
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You will research: What the zone encompasses Why it is named this
Where it is, depth, etc. Why it is named this Definition and any Greek or Latin roots Abiotic factors in your zone Environmental factors Biotic factors in your zone Living factors Adaptations for this zone How have organisms adapted to the environment?
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What your poster should look like:
______ Zone Information: This zone encompasses _____ part(s) of the ocean This zone is named this after the Greek word ____ which means ____ Organisms need to be adapted in these ways to survive in this zone… Biotic Factors: Abiotic Factors: Blue-ringed octopus: biotic Light: abiotic Parrot fish: biotic
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Prefixes and Suffixes (pg. 61)
Supra= above Sub= below Littoral= pertaining to the shore Photic= well lit Aphotic= absence of light Oceanic= open sea Benthic= bottom of the ocean
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Pg. 60 RTW: Which ocean layer is your favorite? Why?
Friday, December 2nd Pg. 60 RTW: Which ocean layer is your favorite? Why? Objective: I will be able to classify and give examples of organisms as planktonic (phytoplankton and zooplankton), nektonic, or benthic. Agenda Plankton Notes (pg. 61) Homework None
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Plankton Plankton = Free-floating organisms (drifters)
Most abundant organisms in the ocean. Bottom of the food chain Two types: phytoplankton & zooplankton
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Why do you think plankton are important to the ocean’s ecosystems?
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Phytoplankton 1) Phytoplankton = autotrophic (photosynthesis provides their energy); Always located near the surface
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Types of Phytoplankton
Diatoms: Single celled protists (kingdom) “pill box” structure made of SiO2 (silicon dioxide) with the living organism inside Unique designs Reproduce by dividing in half We use these everyday!!! How?
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Diatoms are responsible for
causing algae blooms and changing the turbidity, dissolved oxygen and pH of the water. Algae blooms are both human induced and naturally occurring.
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Types of Phytoplankton
Dinoflagellates: class Dinophycea Single celled protist (kingdom) Have two flagella Red tide is caused by an algae (dinoflagellate) bloom. Plankton releases toxins into water. Responsible for massive death/infection in fish and irritation to humans. Some are bioluminescent = light the wakes of waves Some are non-mobile and SYMBIONTS with other animals (corals, giant clams, sea anemones) = ZOOXANTHELLAE
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Red Tide
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Zooplankton 2) Zooplankton = heterotrophic (must obtain their food from outside sources) located beneath phytoplankton, vertically migrate at night. More diverse than phytoplankton. Significance = provides a link between the phytoplankton, producers and the larger fish below.
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Types of Zooplankton Copepods: Kingdom = Animalia phylum-Arthropoda,
Most valuable zooplankton Use small jerky movements Use antennae to slow sinking Filter feeders of phytoplankton
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Copepods link phytoplankton to the
rest of the food chain. Fastest animal in the world.
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Holoplankton= organisms that remain in a planktonic state their entire live
Meroplankton= organisms that are only planktonic part of their lives
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So why should I care… Primary Productivity
Without plankton the entire marine ecosystem would collapse! Primary Productivity 95% in the ocean is from phytoplankton Other 5% is from plants and chemosynthesis.
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Other organisms: Benthic= marine organisms that live on or in the sea bottom
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Other Organisms: Nektonic= marine organisms that can swim
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Pg. 60 S.T.A.R. What are the two types of plankton?
What type of plankton produce their own food? ________ and _______ are types of phytoplankton.
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Pg. 60 RTW: What is the difference between zoo- and phytoplankton?
Friday, December 2nd Pg. 60 RTW: What is the difference between zoo- and phytoplankton? Objective: I will be able to classify and give examples of organisms as planktonic (phytoplankton and zooplankton), nektonic, or benthic. Agenda Study Guide Homework Unit 5 Test on Tuesday, December 6th
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