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Chapter 2 Science Vocabulary
Purposeful Design Science
18
Science
4th Grade
10/05/2011

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Term
body plan
Definition
the overall shape or layout of an organisms body
Term
classify
Definition
to arrange things into groups by their similarities
Term
criteria
Definition
chosen standards used to make decisions
Term
bilateral symmetry
Definition
a body plan in which the right and left halves of the body mirror each other
Term
radial symmetry
Definition
a body plan in which parts are arranged in a circular pattern around the center
Term
vertebrate
Definition
an animal with a backbone
Term
invertebrate
Definition
an animal without a backbone
Term
appendage
Definition
a small body part that extends from the main body part
Term
herbivore
Definition
an organism that only eats plants
Term
carnivore
Definition
an organism that eats only animals
Term
omnivore
Definition
an animal that eats plants and animals
Term
stimulus
Definition
anything that causes an organism to respond
Term
habitat
Definition
a place where an animal lives, finds its food and its shelter
Term
biotic factor
Definition
a living part of a habitat
Term
abiotic factor
Definition
a nonliving part of a habitat
Term
nocturnal
Definition
active at night
Term
classification system
Definition
an arrangement of organisms into groups according to criteria
Term
taxonomist
Definition
a scientist who names and organizes living things according to a classification system
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