6th Grade Science Test 3

Question 1

an invertebrate that has an external skeleton, a segmented body, and jointed appendages

Answer 1

arthropod

Question 2

the tough material from which the external skeleton is made

Answer 2

chitin

Question 3

most insects undergo a transformation in appearance known as

Answer 3

metamorphosis

Question 4

the process in which an insect sheds its external skeleton

Answer 4

molting

Question 5

an animal that is active at night

Answer 5

nocturnal

Question 6

the tiny hairs on a spider’s body that are very sensitive to vibrations

Answer 6

setae

Question 7

scientists who study insects

Answer 7

entomologists

Question 8

the process of arranging animals or other things into groups according to their similarities

Answer 8

classification

Question 9

about ___% of all arthropods belong to the class of insects

Answer 9

90%

Question 10

all insects have how many distinct body regions

Answer 10

three

Question 11

the tubelike structures with which spiders squirt out long, thin streams of liquid silk

Answer 11

spinnerets

Question 12

part of an insect that helps it to feel, hear, and taste

Answer 12

antennae

Question 13

how many pairs of jointed legs to insects have

Answer 13

three

Question 14

an insect resting in a chrysalis or cocoon

Answer 14

pupa

Question 15

the stages of incomplete metamorphosis

Answer 15

egg, nymph, adult

Question 16

the scientific name of an animal uses both the genus and the ___ names

Answer 16

species

Question 17

a useful arachnid with one body section; eight long, scrawny legs; and an appetite for plant lice and other insect pests

Answer 17

harvestman or daddy longlegs

Question 18

a parasite that may cause mange in animals or scabies in humans

Answer 18

mite

Question 19

an arachnid that has a long tail with a poisonous, needlelike point on the end

Answer 19

scorpion

Question 20

Be able to match these terms with pictures. Study in your book and worksheets

Answer 20

beetle (Coleoptera)
true bug (Hemiptera)
social insect (Hymenoptera)
butterfly (Lepidoptera)
moth (Lepidoptera)
dragonfly (Odonata)
fly (Diptera)

Question 21

How many legs do spiders have?

Answer 21

eight

Question 22

the two distinct body regions of spiders

Answer 22

cephalothorax

Question 23

how do spiders breathe?

Answer 23

book lungs

Question 24

many young spiders leave the nest by sailing away on silk strands, a practice called

Answer 24

ballooning

Question 25

the spider that weaves a sheet web on a small portion of the ground

Answer 25

platform spider

Question 26

the spider that makes a net small enough to hold between its legs

Answer 26

ogre-faced spider

Question 27

the spider that sometimes digs a hole in the ground, lines it with silk, and builds a silk trap door for it

Answer 27

trap-door spider

Question 28

the spider that spends its entire life underwater

Answer 28

water spider

Question 29

the spider that is the largest in the world

Answer 29

tarantula

Question 30

the very poisonous spider with a dark violin-shaped mark on its body

Answer 30

brown recluse

Question 31

Explain why Greek and Latin are used for the scientific names of animals.

Answer 31

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.