Science Vocabulary For 7Th Grade

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SPECIES


ESPECIES

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A group of organisms that can mate with each other and produce offspring which can also mate and reproduce.

Un grupo de organismos que pueden aparearse entre sí y producir que también puede aparearse y reproducirse descendencia.

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TISSUE

TEJIDO

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A group of similar cells that perform a specific job.

Un grupo de células similares que realizan un trabajo específico.

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ORGAN

ÓRGANOS

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A group of different tissues that work together to perform a specific job that is more complex than the functions of each tissue by itself.

Un grupo de diferentes tejidos que trabajan juntos para realizar un trabajo específico que es más compleja que las funciones de cada tejido por sí mismo.

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HERBIVORE

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An animal that eats only plants.

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CARNIVORE

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An animal that eats only other animals.

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PREDATOR

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A carnivore that hunts and kills other animals and has adaptations that help it capture the animals it preys upon.

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Prey

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An animal that a predator feeds upon.

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PREY

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An animal that a predator feeds upon.

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OMNIVORE

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An animal that eats both plants and animals.

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PHYLUM

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One of about 35 major groups into which biologists classify members of the animal kingdom.

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INVERTEBRATE

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An animal that does not have a backbone.

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VERTEBRATE

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An animal that has a backbone.

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BILATERAL SYMMETRY

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Line symmetry; the quality of being divisible into two halves that are mirror images.

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RADIAL SYMMETRY

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The quality of having many lines of symmetry that all pass through a central point.

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LARVA

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The immature form of an animal that looks very different from the adult.

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CNIDARIANS

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Animals whose stinging cells are used to capture their prey and defend themselves, and who take their food into a hollow central cavity.

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POLYP

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The cnidarian body plan characterized by a vaselike shape and which is usually adapted for life attached to an underwater surface.

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MEDUSA

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The cnidarian body plan characterized by a bowl shape and which is adapted for a free swimming life.

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REGENERATION

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The ability of an organism to regrow body parts.

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PARASITE

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An organism that lives inside or on another organism and takes food from the organism in or on which it lives.

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HOST

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An organism that provides food to a parasite that lives on or inside it.

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VERTEBRA

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An animal that has a backbone.

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NOTOCHORD

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A flexible rod that supports a chordate's back.

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ECTOTHERM

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An animal whose body does not produce much internal heat.

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CARTILAGE

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A flexible, strong tissue that is softer than bone.

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ENDOTHERM

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An animal whose body controls and regulates its temperature by controlling the internal heat it produces.

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FISH

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An ectothermic vertebrate that lives in the water and has fins.

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SWIM BLADDER

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An internal gas - filled organ that helps a bony fish stabilize its body at different water depths.

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BUOYANT FORCE

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The force that water exerts upward on any underwater object.

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AMPHIBIAN

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An ectothermic vertebrate that spends its early life in water and its adulthood on land, returning to water to reproduce.

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HABITAT

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The specific environment in which an animal lives.

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ATRIUM

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An upper chamber of the heart.

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VENTRICLE

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The lower chamber of the heart, which pumps blood out to the lungs and body.

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REPTILE

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An exothermic vertebrate that has lungs and scaly skin.

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URINE

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The watery fluid in which the wastes produced by an animal's cells are excreted.

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FOSSIL

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The hardened remains or other evidence of a living thing that existed a long time in the past.

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SEDIMENTARY ROCK

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Rock formed from hardened layers of sediments - particles of clay, sand, mud, or silt.

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PALENONTOLOGIST

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A scientist who studies extinct organisms, examines fossil structure, and makes comparisons to present-day organisms.