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Reading Study Guide Chapter 10 Mollusks, Arthropods, and Echinoderms Last Updated 4/2/2007

10-1 Mollusks  (pp.328-333)

Page 328

1.  From the shells of ___________________ Native Americans made wampum belts.

2.  Name one use for a wampum belt. __________________________________________

Characteristics of Mollusks (p.329)

3.  What is a MOLLUSK?
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4.  The thin layer of tissue that covers a snail's internal organs is called the _______________.

Name the 3 functions of a mollusks foot.

5. ___________________          

6. ___________________        

7. ___________________

8.  Mollusks have a digestive system with ________ opening(s).

9.  Mollusks have _____________________  symmetry?

10.  Most mollusks have a/an __________________ circulatory system.

11.  Which organs of a mollusk obtain oxygen from the water? __________________

Snails and Slugs  (p.330)

Name the 3 Groups of Mollusks

12. __________________          13. __________________          14. __________________

15. The ____________________ are the largest group of mollusks.

16. How many shells do gastropods have? _________________________________________

17. Animals that eat only other animals are called ______________________________.

18. Animals that eat only plants are called ______________________________.

19. Describe a RADULA. _______________________________________________

20. The _________________ uses it radula to bore a hole through an oyster's shell.

21.  How does a gastropod move? __________________________________________

22.  A gastropod's foot oozes ______________ which makes it easier to move.

Two-Shelled Mollusks  (p.331)

23.  What are BIVALVES?
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Name 4 bivalves.

24. _____________      25. _____________      26. _____________       27. _____________

28.  Bivalves do not have radulas, instead, most are __________________ feeders.

29.  Most bivalves are ____________________, they eat both plants and animals.

30.  Name the bivalve in Figure 4. _____________________

31.   Name the bivalve that makes a pearl. ________________________

Octopuses and Their Relatives   (p.332-333)

32.  What is a  CEPHALOPOD?
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33.  Name a cephalopod with an external shell. __________________________

34.  Name a cephalopod with a shell inside their body. ______________________

35. Name a cephalopod that does not have a shell. ________________________

Circle all the correct answers about cephalopods.

36. Cephalopod circulatory system:       Closed circulatory system           Open circulatory system

37. Obtaining food:             Herbivore           Carnivore          Omnivore

38. Cephalopod suckers:      Touch                 Taste                 Smell

39. Cephalopod eyes:         Small                  Large

40. Cephalopod Vision:          Poor                   Good                 Excellent

41.  Cephalopod brains:         Small                  Large

42. Describe how a cephalopod moves.
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It's About You

43. Check the mollusks you have eaten.  Circle the check mark if you liked it!

            Clams _______          Oysters ______                Scallops ______    

            Snails (Escargot)   ______    Squid (Calamari) ______   Mussels ________

Extra Credit

There are approximately 150,000 species of mollusks.   27 percent are gastropods.
About how many species of gastropods are there? _________