WorksheetsUnit 9: Echinoderms
Total questions: 18
Worksheet time: 9mins
Name
Class
Date
1.
The word echinoderm means
a)
lily-like
b)
water polyp
c)
five arms
d)
spiny skin
2.
Echinoderms are spiny-skinned, invertebrates that live on the
ocean floor, the term for this is _________.
a)
pelagic
b)
benthic
c)
photic
d)
sedentary
3.
Echinoderms are only found in fresh water.
a)
True
b)
False
4.
There are (a) extinct classes of echinoderms. (Give your answer in number format)
5.
The internal skeleton of echinoderms is made of calcium carbonate plates called ____.
a)
Ossicles
b)
Pedicellarie
c)
Spines
d)
Tube feet
6.
Some of the spines found on sea stars and sea urchins are
surrounded by numerous tiny pincer-like appendages
called _________________.
a)
Ossicles
b)
Pedicellarie
c)
Spines
d)
Tube feet
7.
____________ are like eye droppers with suction cups that assist mainly in movement and feeding.
a)
Ossicles
b)
Pedicellarie
c)
Spines
d)
Tube feet
8.
Echinoderms have a simple digestive system with a mouth, and (a) stomachs (Give your answer in number form).
9.
Among the amazing abilities of starfish is a remarkable talent for regeneration meaning that a starfish can lose a ray and regrow a new one.
a)
False
b)
True
10.
Check all of the species of echinoids.
a)
sea urchins
b)
heart urchins
c)
sea biscuits
d)
sand dollars
e)
linckia
11.
If you break open , the dead skeleton of a sand dollar, there are many hard, loose, white pieces; these were the ___________ of the sand dollar.
a)
bones
b)
teeth
c)
offspring
d)
spines
12.
A spiny, hard-skinned, long-armed animal that lives on the rocky sea floor, from shallow waters to great depths. These are named so because parts of their arms
break off easily as a protective measure; they can
then regenerate the missing parts.
a)
Asteroidea
b)
Brittle Stars
c)
Crinoidea
d)
Crown-of-Thorns Sea Star
13.
Means “lily-like” because they have long stalks that
attach to rocks or to the ocean floor.
a)
Asteroidea
b)
Brittle Stars
c)
Crinoidea
d)
Crown-of-Thorns Sea Star
14.
Means “star-like"; they are found in costal waters all over the world.
a)
Asteroidea
b)
Brittle Stars
c)
Crinoidea
d)
Crown-of-Thorns Sea Star
15.
A large, multiple-armed starfish that usually preys upon hard, or stony, coral polyps.
a)
Asteroidea
b)
Brittle Stars
c)
Crinoidea
d)
Crown-of-Thorns Sea Star
16.
Outbreaks of this venomous invertebrate pose one of the most significant threats to the Great Barrier Reef.
a)
Asteroidea
b)
Brittle Stars
c)
Crinoidea
d)
Crown-of-Thorns Sea Star
17.
Sea cucumbers can expel most of their internal organs to confuse predators, they later regrow the organs; this is called _____.
a)
dessication
b)
evisceration
c)
dissipation
d)
expiation
18.
Echinoderms play numerous ecological roles.
______________ burrow into the sand, providing more oxygen
at greater depths of the sea floor. This allows more organisms to live there.
a)
sand dollars
b)
sea cucumbers
c)
both sand dollars and sea cucumbers
d)
neither sand dollars nor sea cucumbers
100 %
