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4th Grade Organisms SC 2019

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Term
Definition
Organism   Any living thing  
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Invertebrates   Animals with no backbone  
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Vertebrates   Animals with backbones  
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Mammal   Has fur or hair, feeds its young milk, and has lungs  
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Bird   Has wings and feathers  
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Reptile   Has dry scales or plates, most lay eggs, and breathes with lungs  
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Amphibian   Has moist skin, gills or lungs, or can breathe through skin and goes through metamorphosis  
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Fish   Most have bones or cartilage skeletons, fins, and breathes with gills  
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Adaptation   A physical or behavioral trait that allows an organism to survive.  
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Life cycle   Stages of growth and development from birth to death  
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Animals   A group of organisms that cannot make their own food.  
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Senses   These give animals information about their surroundings.  
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Habitat   The place where an organism lives.  
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Smell   The sense used to detect odors.  
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Hearing   The sense that allows the animal to listen to things.  
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Sight   The sense that allows an animal to see its habitat.  
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Touch   The sense that allows an animal to feel things in its environment.  
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Taste   The sense that is detected by the tongue.  
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Inherited traits   Traits that are passed from parent to offspring (children)  
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Acquired traits   Traits that are learned over time.  
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Behavioral adaptation   Something an animal does to help it survive  
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Structural adaptation   Special body parts to help it survive  
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Migration   Moving to a different place to live or reproduce.  
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Camouflage   Blending into its surroundings  
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Mimicry   Looking like another animal  
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Instinct   A behavior that an animal automatically knows how to do; They do not need to be taught it.  
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Trait   A characteristic passed on from its parents  
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Sea jellies   Invertebrate with soft bodies and long, stinging tentacles  
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Worms   Invertebrates with long, tube-shaped soft bodies and no legs  
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Arthropods   Largest group of invertebrates that include insects, spiders and crabs. They have an outer shell for protection and their legs have joints.  
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Mollusks   Invertebrates with soft bodies and some have a shell. Examples are squids, octopuses, snails and clams.  
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Egg   A baby develops inside and hatches out.  
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Live birth   Babies are born instead of hatching out of eggs.  
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Metamorphosis   A change in form as they grow into an adult  
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Complete metamorphosis   Has 4 stages: egg, larva, pupa, then adult  
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Incomplete metamorphosis   Has 3 stages: egg, nymph, adult  
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Nymph   A smaller, younger version of the adult. It molts until it reaches adult size.  
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Molts   To shed its outer covering, or exoskeleton as it grows.  
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Structures   An arrangement of parts an organism has to help it survive  
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Flowering plants   Plants with seeds that grow flowers  
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Deciduous trees   Trees that lose their leaves in the fall and then grow new leaves in the spring. Nuts are the seeds of some trees.  
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Coniferous trees   Trees that grow cones instead of flowers that hold seeds. Leaves are called needles and they do not fall off in the autumn.  
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Spores   A small cell that grows into a new plant made by mosses, ferns and fungi.  
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Germination   When a seed splits open and sprouts.  
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Seedling   A young plant  
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Roots   Absorb water and nutrients from the soil  
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Leaves   Contains chlorophyll that works with the sun to make food for the plant.  
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Stem   Holds the plant up and gives it support. It contains tube-like structures to move water and nutrients to the leaves from the roots.  
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Spine   Another word for backbone  
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Habitat   The place where an organism lives.  
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Structural adaptation   Special body parts that help the organism survive.  
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Behavioral adaptation   Special behaviors that help an organism survive.  
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