Name DateClass
Mollusks, Arthropods, and Echinoderms ■ Adapted Test
Mollusks, Arthropods, and Echinoderms
Multiple Choice
Write the letter of the correct answer on the line at the left.
____ 1. Clams, snails, and squids are all
a. mollusks.
b. insects.
c. echinoderms.
____ 2. Which sentence is true about mollusks?
a. They are vertebrates.
b. They have a mantle.
c. They are arachnids.
____ 3. Most bivalves are omnivores. What do omnivores eat?
a. only plants
b. only animals
c. plants and animals
____ 4. Which of these body parts does an octopus have?
a. tentacles
b. exoskeleton
c. tube feet
____ 5. Crayfishes and lobsters are
a. insects.
b. crustaceans.
c. bivalves.
____ 6. Spiders and scorpions are
a. bivalves.
b. insects.
c. arachnids.
____ 7. Many insects undergo metamorphosis. What does
metamorphosis mean?
a. a big change in the body
b. a body part
c. a way to find food
____ 8. Which is one of the body sections of an insect?
a. tail
b. radula
c. thorax
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Name Date Class
Mollusks, Arthropods, and Echinoderms ■ Adapted Test
____ 9. Some insects are decomposers. Decomposers eat
a. live plants.
b. decaying plants, animals, and waste.
c. animal blood.
____ 10. Echinoderms move using tube feet. Tube feet are a part of the
a. water vascular system.
b. endoskeleton.
c. mantle.
Completion
mantle endoskeleton foot radula
vector nymph exoskeleton
Read each term in the box. In each sentence below, fill in one of the terms. Not all terms will be used.
11. A mollusk’s covers the organs and
can make a hard shell.
12. Gastropods use a(an) to gather food.
13. During gradual metamorphosis, the stage after egg is
14. An insect that spreads disease is a(an)
15. A skeleton inside the body is called a(an)
True or False
If a statement is true, write true. If it is false, write false.
16. Mollusks move using tube feet.
17. Herbivores eat only plants.
18. Bivalves have one shell.
19. Arachnids have six legs.
20. Insects have three body sections.
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9
Name DateClass
Mollusks, Arthropods, and Echinoderms ■ Adapted Test
Using Science Skills
Use the picture below to answer questions 21, 22, and 23.
b.
c.
a.
____ 21. Applying Concepts Label the following parts on the
diagram: legs, antennae, wings.
____ 22. Classifying What group does the animal in the diagram
belong to?
a. insects
b. echinoderms
c. mollusks
____ 23. Applying Concepts This animal has three body sections.
What is the middle body section called?
a. head
b. thorax
c. abdomen
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10
NameDateClass
Mollusks, Arthropods, and Echinoderms ■ Adapted Test
Using Science Skills
The picture below shows the life cycle of a grasshopper. Use the diagram to answer questions 24 and 25.
1 Egg
4 Adult
2 Nymph
3 Larger nymph
____ 24. Interpreting Diagrams The life cycle shown here is an
example of
a. gradual metamorphosis.
b. complete metamorphosis.
c. asexual reproduction.
____ 25. Making Generalizations An insect in the nymph stage is
most similar to
a. a fertilized egg.
b. an adult insect.
c. a pupa.
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