Ch 4 - Exploring the World of Invertebrates

Question 1

What do we call animals without backbones?

Answer 1

Invertebrates

Question 2

What are five ways invertebrates are alike?

Answer 2

They have no backbone

They usually have weak muscles

They are usually small animals with soft bodies

If they do have skeletons, the skeletons are on the outside of their bodies for strength and protection

They are cold-blooded

Question 3

What might happen to an invertebrate if the temperature becomes too hot or too cold?

Answer 3

They might die

Question 4

How does the temperature affect the way invertebrates move?

Answer 4

Invertebrates move slowly on cold days and quickly on warm days.

Question 5

How do invertebrates feel things?

Answer 5

Invertebrates feel through little hairs on their legs or feet.

Question 6

What do we call the special projections that help protect worms from hungry birds?

Answer 6

Setae

Question 7

How many hearts does an earthworm have?

Answer 7

ten hearts

Question 8

How many arms do octopuses have?

Answer 8

Eight

Question 9

What are the arms of an octopus called?

Answer 9

Tentacles

Question 10

What word means changing colour to match your surroundings?

Answer 10

camouflage

Question 11

Starfish walk on special feet called…

Answer 11

tube feet

Question 12

Why do fishermen dislike starfish?

Answer 12

They dislike starfish because they eat the clams and oysters the fishermen want to catch and sell.

Question 13

What is the largest group of invertebrates called?

Answer 13

insects

Question 14

Why can we hear mosquitoes when they are so tiny?

Answer 14

Their wings beat 300 times a second, which makes a high-pitched buzzing sound.

Question 15

In what three ways are all insects alike?

Answer 15

They all have six legs

They all have three body parts

They all have an outer skeleton

Question 16

What are the three parts of an insect’s body?

Answer 16

the head

the thorax

the abdomen

Question 17

What does an insect’s head contain?

Answer 17

brain

antennae

eyes

mouth

Question 18

What is the thorax?

Answer 18

The thorax is the insect’s “motor room.” It has wings for flying and legs for walking or swimming.

Question 19

What does the abdomen contain?

Answer 19

The abdomen contains the insect’s heart and stomach.

Question 20

What do we call the tiny holes along the side of an insect’s abdomen?

Answer 20

spiracles

Question 21

What does an insect use its spiracles for?

Answer 21

Insects breath through their spiracles.

Question 22

What colour is an insect’s blood?

Answer 22

Green or yellow, or sometimes colourless.

Question 23

What are the four stages of an insect’s metamophosis?

Answer 23

egg

larva

pupa

adult

Question 24

What are the insect’s main sense organs?

Answer 24

antennae

Question 25

What are compound eyes?

Answer 25

Compound eyes are eyes made up of tousands of lenses that work together as one eye.

Question 26

Can all insects hear?

Answer 26

No

Question 27

Name several helpful insects.

Answer 27

bee

ladybug

praying mantis

Question 28

Name this part of the insect.

Answer 28

eye

Question 29

Name this part of the insect.

Answer 29

antennae

Question 30

Name this part of the insect.

Answer 30

mouth

Question 31

Name this part of the insect.

Answer 31

wings

Question 32

Name this part of the insect.

Answer 32

legs

Question 33

Name this part of the insect.

Answer 33

spiracles

Question 34

Name this part of the insect.

Answer 34

head

Question 35

Name this part of the insect.

Answer 35

thorax

Question 36

Name this part of the insect.

Answer 36

abdomen

Question 37

What is mimicry?

Answer 37

Mimicry is when one animal looks very much like another animal for protection.

Question 38

How many legs does a spider have?

Answer 38

Eight

Question 39

What is a young spider called?

Answer 39

A spiderling