|Simple Invertebrates Webquest
Scientists have identified and named more
than 1.8 million species of animals. It is estimated
that there are another 3 million to 30 million more to
identify. Animals are classified into two major groups;
vertebrates and invertebrates. Invertebrates are
classified as animals without a backbone and make up
about 97% of all animal species. Simple invertebrates
include sponges, cnidarians, flatworms, and roundworms.
Follow the hyperlinks below to answer the following
Kingdom and Phylum do sponges belong to?
different Classes of sponges.
known species of sponges are there?
different body shapes that sponges can have.
What is the
name of the specialized cell where food is
9. Sketch and label the sponge’s
10. Define osculum.
11. Define Porifera.
12. What are the two species of sponges pictured
does the word Cnidarian come from and what does it mean?
14. Name the four major groups of Cnidarians and list
an example of each.
15. Click on the links of each of the four groups of
Cnidarians and sketch one example animal from each
16. Why are Cnidarians considered simple
17. List the two different body types of
Cnidarians and sketch an example of each.
18. What is the coiled thread-like stinger that all
Cnidarians have called?
19. Describe how the stinger protects the animal.
20. Are Cnidarians deadly to humans? Why or why not?
21. Name three species of Cnidarians pictured (common
22. What is a coral reef?
23. List seven examples of organisms that are
sheltered by coral reefs.
24. What are the two types of coral? List an example
25. Where are coral reefs found in the world?
26. Describe a Fringing Reef.
27. Describe a Barrier Reef.
28. Describe a Carol Atoll.
29. How are coral reefs in danger?
30. About how
many species are know in this group?
31. How does a flatworm move?
32. What part of a flatworm helps it sense light?
33. How many openings does a flatworm have (for eating
and getting rid of wastes)?
34. How long can a flatworm be?
Four classes of Flatworms
35. Go to the bottom of the link
above and click on each of the four classes of
flatworms. Read the description of each type of
flatworm, then list the common name and write a brief
summary from each description.
36. How many known species of roundworms are there?
37. How many eggs can some species of roundworms lay
in a single day?
38. How many unknown species of roundworms are there
said to be?
Types of Roundworms
39. Name three common types of roundworms.
40. Where do roundworms live?
41. Describe the body shape of a roundworm.
42. Where does Ascaris live?
43. What part of the human body do adult Ascaris worms
44. How many eggs can be produce a day?
45. How long can adult Ascaris worm live?
46. At the bottom of the web page are four pictures of
Ascaris roundworms. Describe what you see in each