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(8th grade) Chapter 10 Mollusks and Arthropods

Total questions: 71

Worksheet time: 1hrs 14mins

Name
Class
Date
1.

Which of the following are cephalopods?

a)

snails, slugs, sea butterflies

b)

clams, osters, scallops

c)

octopus, squids, nautiluses

2.

Which of the following are gastropods?

a)

clams, osters, scallops

b)

snails, slugs, sea butterflies

c)

octopuses, squids, nautiluses

3.

Which of the following are bivalves?

a)

clams, oysters, scallops

b)

snails, slugs, sea butterflies

c)

earthworms, leech

4.

What symmetry does a bivalve have?

a)

Bilateral symmetry

b)

radial symmetry

c)

asymmetrical symmetry

5.

What symmetry do Gastropods have?

a)

Radial symmetry

b)

Bilateral symmetry

c)

no symmetry

6.

What symmetry does a Cephalopod have?

a)

no symmetry

b)

Bilateral symmetry

c)

Radial symmetry

7.

Which of these is a Characteristic of a Mollusk?

a)

They Mostly have Inner or Outer Shells

b)

They Only Eat Meat

c)

They Mostly have No Shell at all

d)

Most Mollusks Do Not have a Thick Muscular Foot

8.

Which of these lists the types of Mollusks?

a)

Arthropods, Echinoderms, Gastropods

b)

Bivalves, Cephalopods, Gastropods

c)

Bivalves, Gastropods, Echinoderms

9.

The Foot is Used for_______, ______ and _______________. (Choose 3)

a)

Fighting

b)

Bury themselves in the sand

c)

Eating

d)

Moving

10.

Which one is a characteristic of a gastropod?

a)

They Have a Radula

b)

They have two shells

c)

They have tentacles

11.

What is one way the Mollusks are Grouped?

a)

By the way they Eat

b)

By the way they Walk

c)

By the type of shell

12.

What is another Characteristic of a Mollusk?

a)

They have a thick muscular foot

b)

They have 35 legs

c)

They eat Meat

13.

Gastropods have.......

a)

A stomach foot

b)

Has 2 Shells

c)

Has tentacles

d)

No radula

14.

Bivalves have ........

a)

A radula

b)

Has 4 shells

c)

Has 2 shells

d)

Has tentacles

15.

Mollusks are.... (choose 3)

a)

Cephalopods

b)

Bivalves

c)

Gastropods

d)

Echinoderms

16.

How are mollusks grouped?

a)

What food they eat

b)

The presence of the shell and or what type of shell

c)

How big they are

d)

How small they are

17.

What is this a picture of

a)

A snail

b)

A Beetle

c)

A crab

d)

A squid

e)

A seaanemone

18.

What is this?

a)

A Snail

b)

A squid

c)

A scallop

d)

A Beetle

19.

An animal with a soft, unsegmeneted body and no bones?

a)

Mollusk

b)

Mantle

c)

Feet

d)

Exoskeleton

20.

A tough layer of tissue that forms a covering for mollusks soft body is called

a)

Bivalves

b)

Mantle

c)

Echinoderms

d)

Exoskeleton

21.
# 7 Points to what feature?
a)
excurrent siphon
b)
Posterior adductor muscle
c)
gill 
d)
mantle
22.
# 16 Points to what feature?
a)
excurrent siphon
b)
incurrent siphon
c)
intestines
d)
mantle
23.
How do clams breathe? 
a)
Mouth 
b)
Lungs
c)
Flapper Valves
d)
Gills
24.
The shell consists of two halves called
a)
Shells
b)
Valves
c)
Hinges 
d)
Mantle
25.
What do the rings on the shell indicate?
a)
species
b)
age
c)
size
d)
genus
26.
What holds the two shells together?
a)
Umbo
b)
Hinge
c)
Anterior adductor 
d)
Mantle
27.
What is the oldest part of the shell?
a)
Umbo
b)
Hinge
c)
Anterior adductor 
d)
Mantle
28.
# 8 Points to what feature?
a)
excurrent siphon
b)
incurrent siphon
c)
gill 
d)
mantle
29.

# 5 Points to what feature?

a)

Lateral Tooth

b)

Umbo

c)

Gill

d)

Mantle

30.

Which is the correct description of an arthropod's body?

a)

A furry coat with large fangs

b)

An interior skeleton with leathery skin

c)

Two or more separate segments that have a hard outer cover with appendages

d)

An eight legged animal with mandibals

31.

Which three characteristics do arthropods have

a)

Fur, Eyes, and Paws

b)

Jointed segments, an exoskeleton, and body cavities

c)

Claws, Leathery Skin, and Gills

d)

Eat, Breath, and Sleep

32.

What is molting?

a)

Melting with an "o"

b)

The shedding of an exoskeleton

c)

When an arthropod loses it's legs

d)

A way to make chocolate

33.

How do exoskeletons help the arthropod?

a)

It is used for mating

b)

It helps them hibernate

c)

It looks cool

d)

It acts as protection for the arthropod

34.

Why do arthropods molt?

a)

It happens for no reason

b)

The females don't like the one that they had

c)

The exoskeleton doesn't grow with the arthropod

d)

They are done hibernating

35.

What is the difference between a millipede and a centipede?

a)

Millipedes have more legs and eat plants

b)

Centipedes are female and millipedes are male

c)

Millipedes are sea creatures

d)

Centipedes are extinct

36.

Which of these is an arthropod?

a)

Scorpion

b)

Dog

c)

Aligator

d)

Bee

37.
Which class of Mollusks includes snails, slugs, or nudibranches?
a)
Cephalapods
b)
Bivalves
c)
Gastropods
38.
How do arthropods move?
a)
Swimming
b)
Jointed Appendages
c)
Opposable Thumbs
d)
They do not move
39.
Appendages on crayfish that serve as feelers sensitive to touch, taste and balance
a)
chelipeds
b)
mandibles
c)
antennae
d)
swimmerets
40.
What is the exoskeleton of crustaceans and echinoderms made of?
a)
Hemocoel
b)
Dermocoel
c)
Carbohydrates
d)
Chitin
41.
The tough layer on the outside of arthropod's bodies that provide protection and support
a)
nauplius
b)
exoskeleton
c)
skeleton
d)
shell
42.
Why do arthropods have to shed their exoskeletons?
a)
it wears out
b)
they don't shed
c)
it limits the size they can grow
d)
to go from water to land environments
43.
Appendages on crayfish for chewing food
a)
antennae
b)
maxillae
c)
mandible
d)
chelipeds
44.
Which part of the Mollusk body is specialized for burrowing, feeding, and movement?
a)
trochophores
b)
visceral mass
c)
mantle
d)
foot
45.
Krill and crabs are members of this group
a)
Echinoderms
b)
Poriferans
c)
Arthropods
d)
Mollusks
46.

How many legs do Arachnids have?

a)

4

b)

6

c)

8

47.

A hard covering on the OUTSIDE of the body is known as ________________.

a)

Endoskeleton

b)

Exoskeleton

48.

What are the TWO MAIN body sections of an Arachnid? (two answers needed)

a)

Head

b)

Thorax

c)

Abdomen

d)

Tail

49.

What does the word 'arachnid' mean in Greek?

a)

Scorpion

b)

Spider

c)

Insect

50.

Is this an Arachnid?

a)

Yes

b)

No

51.

Is this an Arachnid?

a)

Yes

b)

No

52.
Small appendages on the underside of the abdomen used to circulate water and to carry eggs in females?
a)
Swimmerets
b)
Cephlothorax
c)
Telson Tail
d)
Maxilliped
53.
Large sensory appendages used as feelers on the head of the crustacean?
a)
Swimmerets
b)
Maxillae
c)
Antennas
d)
Maxilliped
54.
What crayfish appendage is #2?
a)
Eyes
b)
Pincer
c)
Antennules
d)
Rostrum
55.
When crayfish molt, what happens?
a)
The shell stay on the crayfish.
b)
The crayfish will loose it's shell and a new one will grow.
56.
Which word BEST describes a crayfish's legs? 
a)
Jointed
b)
Curved
c)
Straight
57.
Crayfish use their antennae for __________
a)
sensing vibrations
b)
eating
c)
walking
d)
seeing
58.

Is the crayfish a vertebrate or an invertebrate?

a)

vertebrate

b)

invertebrate

59.
What family does a crayfish belong to? 
a)
Mammal
b)
Reptile
c)
Amphibian
d)
Crustacean
60.
Crayfish are omnivores. What does that mean?
a)
They eat plants and animals.
b)
They eat only plants.
c)
They eat only animals.
d)
They don't eat.
61.
Since crayfish live in water, they breathe with lungs.
a)
True
b)
False
62.

Identify structure #3

a)

Cephalothorax

b)

Antennae

c)

Swimmerettes

d)

Chelipeds

63.

What is the structure labeled 4

a)

Antenna

b)

compound eye

c)

cephalothorax

d)

abdomen

64.

What is the structure labeled 10

a)

uropod

b)

compound eye

c)

cephalothorax

d)

abdomen

65.

Which kingdom do Crayfish belong to?

a)

Arthropoda

b)

Decapoda

c)

Crustacea

d)

Animalia

66.

Crayfish belong to which phylum?

a)

Arthropoda

b)

Crustacea

c)

Decapoda

d)

Animalia

67.

Which organism is in the same Phylum as Crayfish?

a)

Earthworm

b)

Crab

c)

Bird

d)

Fish

68.

How many chilopeds do Crayfish have?

a)

4

b)

5

c)

2

d)

1

69.
What are 8 & 11?
a)
telson
b)
swimmerets
c)
uropods
d)
chelipeds
70.
Why was 6 afraid of 7?
a)
Because it has no curves
b)
Because 7 ate 9
71.
To infinity....
a)
what's infinity?
b)
and beyond!

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