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5/17 & 5/18 - 7th Grade Agenda
Learning Objective: Learn about FishCollect HW: Reading & Notetaking 219 – 222Who wants to be a MillionaireChap 11 TestClasswork: “Scientific Names”Video: BBC Life “Challenges of LIfe”Textbook Reading 462 – 467HW: Reading & Notetaking 223 – 226
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Annular Eclipse: May 20th (Sunday)
• 6:38pm
• 78% of the sun covered up by the moon
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Annular Eclipse: May 20th (Sunday)
• You can not stare directly at the sun
• You must wear Eclipse glasses
• You can order them from Amazon or rainbowsymphonystore.com
• 5 Extra credit points if you take a picture of you watching the eclipse with Eclipse glasses
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Reflection
• Prompt: Write 3 questions that you have about frogs.
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What type of animal is a vertebrate?
• Fish• Sharks• Reptiles• Amphibians• Mammals• Birds
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What do all Vertebrates share in common?
• Backbone• Endoskeleton• Endoskeleton allows
an animal to become larger than Exoskeleton. Why?
Skeleton of a Seal
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One of the most primitive Vertebrate - Lancelet
• Notochord: Flexible rod that supports the animal’s back
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What is Ectotherm vs. Endotherm
• Ecto (Outer) + Therm (Heat) = Gets the heat from the outside. Cold blooded
• Examples of Ectotherm animals: Fish, Amphibian & Reptiles
• Endo (Inner) + Therm (Heat) = Gets the heat from the inside. Warm blooded
• Examples of Endotherm animals: Mammals & Birds
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Fish without jaws - Lampreys
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Cartilaginous Fishes – Sharks and Rays
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Bony Fish
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What are the characteristics of Fishes?
• Vertebrate• Live in water• Have Fins• Ectotherm (cold
blooded)• Have Scales• Obtain oxygen
through gills
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How does Fish obtain Oxygen?
• Fish obtain oxygen in the water through its gills
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Does Fish break down H2O into Hydrogen and Oxygen?
• Fish do not break H2O into hydrogen and oxygen.
• There is oxygen gas dissolved in the water. • Their gills extract this oxygen gas out of the
water and return CO2 just as our lungs do. • What would happen to the fish if there was no
oxygen in the water?
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Most fishes have external fertilization
• In external fertilization, the eggs are fertilized outside the female’s body.
• The male hovers close to the female and spreads a cloud of sperm cells over the eggs she releases
• There are exceptions – Guppies, Mollies (Live birth)
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Amphibians evolved from Fish
• Mudskipper Fish (Type of Goby Fish)
• It can live out of water for long periods
• It can breath through its skin just like Amphibians
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What are Amphibians?
• The word amphibian means “double life”
• After beginning their lives in water
• Most amphibians spend their adulthood on land
• Returning to water to reproduce.
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Life cycle of an Amphibian
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Do tadpoles have lungs or gills?
• Gills
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Do frogs have lungs or gills?
• Lungs