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Science Chapter 2

Bob Jones University; 4th Grade Science Terms Ch. 2; Insects and Spiders

TermDefinition
anthropod means "jointed foot"; a group of invertebrates with an exoskeleton, separate body parts, and jointed legs
exoskeleton a hard, outer covering on an arthropod
molt to shed
insect arthropods with three body sections, and six legs
thorax the middle body section of an insect's body; the legs and wings are on this section
abdomen the last section of an insect's body; stingers are found here; digestion happens here
proboscis a long tube in an insect's head with which an insect can suck liquid
metamorphosis a process of change in the form of an animal as it grows
incomplete metamorphosis egg ----> nymph ----> adult
complete metamorphosis egg ----> larva ----> pupa -----> adult
instinct a knowledge or skill an animal is born with
colony a group of insects that live together
spiders arthropods with two body parts and eight legs
arachnids a group of arthropods that includes spiders; other types of arthropods are scorpions, daddy long legs, mites, and ticks
pedipalps two leg-like parts on a spiders head that it uses to hold its prey while eating
spinnerets tiny tubes on a spider's abdomen that produce its silk
invertebrate an animal with no backbone
Created by: christabeth3130