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Science Notes

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
Chordate   The phylum whose members have a notochoord, a nerve cord and slits in throat area.  
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Notochord   A flexible rod that supports a chordates back.  
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Cartilage   A fllexiable tissue that is softer than bone.  
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Vertebrae   The bones that make up the backbone of an animal.  
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Ecttotherm   An animal whose body does not produce much internal heat.  
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Endotherm   An animal whose body controls and regulates its tempurature by controlling the internal heat it produces.  
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Fish   An ectothermic vertebrate that lives in the water and has fins  
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Swim Bladder   An internal gas-filled organ that helps a bony fish stabilize its body at different water depths.  
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Buoyant Force   The force that water exerts upward on any underwater object.  
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Amphibian   An ectothermic invertebrste that spends its early life in the water and its adulthood on land, returnig to the water to reproduce.  
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Atrium   An upper chamber of the heart.  
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Ventricle   The lower chamber of the heart, which pumps blood out to the lungs and body.  
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Habitat   The specific envirement in which an aniaml lives.  
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Reptile   An exothermic vertebrate that has lungs and scaly skin  
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Urine   The watery fluid in which the wastess produced by an animal's cells are excerted.  
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Fossil   The hardended remains or other evidence of a living thing that existed a long tome in the past.  
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Sedimentary Rock   Rock formed from hardened layers of sediment- particlesof clay, maud, or silt.  
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Paleontologist   A scientist who studies extinct organisms, examines fossil structures, and makes comparisons to present-day organisms.  
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