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4th Grade Organisms

4th Grade Organisms SC 2019

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