6th Grade Science Test 3 Flashcards
an invertebrate that has an external skeleton, a segmented body, and jointed appendages
arthropod
the tough material from which the external skeleton is made
chitin
most insects undergo a transformation in appearance known as
metamorphosis
the process in which an insect sheds its external skeleton
molting
an animal that is active at night
nocturnal
the tiny hairs on a spider’s body that are very sensitive to vibrations
setae
scientists who study insects
entomologists
the process of arranging animals or other things into groups according to their similarities
classification
about ___% of all arthropods belong to the class of insects
90%
all insects have how many distinct body regions
three
the tubelike structures with which spiders squirt out long, thin streams of liquid silk
spinnerets
part of an insect that helps it to feel, hear, and taste
antennae
how many pairs of jointed legs to insects have
three
an insect resting in a chrysalis or cocoon
pupa
the stages of incomplete metamorphosis
egg, nymph, adult
the scientific name of an animal uses both the genus and the ___ names
species
a useful arachnid with one body section; eight long, scrawny legs; and an appetite for plant lice and other insect pests
harvestman or daddy longlegs
a parasite that may cause mange in animals or scabies in humans
mite
an arachnid that has a long tail with a poisonous, needlelike point on the end
scorpion
Be able to match these terms with pictures. Study in your book and worksheets
beetle (Coleoptera) true bug (Hemiptera) social insect (Hymenoptera) butterfly (Lepidoptera) moth (Lepidoptera) dragonfly (Odonata) fly (Diptera)
How many legs do spiders have?
eight
the two distinct body regions of spiders
cephalothorax
how do spiders breathe?
book lungs
many young spiders leave the nest by sailing away on silk strands, a practice called
ballooning
the spider that weaves a sheet web on a small portion of the ground
platform spider
the spider that makes a net small enough to hold between its legs
ogre-faced spider
the spider that sometimes digs a hole in the ground, lines it with silk, and builds a silk trap door for it
trap-door spider
the spider that spends its entire life underwater
water spider
the spider that is the largest in the world
tarantula
the very poisonous spider with a dark violin-shaped mark on its body
brown recluse
Explain why Greek and Latin are used for the scientific names of animals.
When animals were classified, educated people in the Western world were familiar with Latin and Greek. Latin and Greek terms were used by scientists so that scientists of all countries would understand what animal was being referred to.
