1. Unit 3 review: Water Invertebrate animals

2. The largest group of invertebrates is the
Crustaceans.
Coelenterates.
Mollusks.

3. How many pairs of legs does a lobster have?4 5 6

4. A sea anemone can sting tiny fish with its
Gills.
Sponges.
Tentacles.

5. Coral animals and jellyfish. Clams and octopuses.
Two kinds of coelenterates are
Crabs and lobsters.
Coral animals and jellyfish.
Clams and octopuses.

6. Which coelenterate has a transparent body and no brain?
Sea anemone
Coral animal
Jellyfish

7. Losing a shell and growing a larger one is
Making a reef.
A way of hiding.
Called molting.

8. New coral animals attach themselves to
Vertebrae.
Skeletons.
Plants.

9. Most mollusks have
Claws.
Shells.
Bad breath.

10. A crab is a
Crustacean.
Coelenterate.
Mollusk.

11. Starfish move with their
Tube feet.
Jointed legs.
Stiff spines.

12. What does a clam have that helps it to open and close its mouth?
Foot
Ligament
Tendon

13. An invertebrate water animal that can look like a head of cabbage or trees without leaves is a
Coral animal.
Octopus.
Sponge.

14. What force does an octopus use to move?
Gravity
Netwon’s law
Jet propulsion

15. Which mollusk does not have a shell?
Octopus
Clam
Snail

16. Lobsters have
Claws.
Scales
Bad attitudes.

17. How many tentacles do snails have?2 3 4

18. An invertebrate is an animal
With a backbone.
Without a backbone.
Without a brain.

19. An octopus escapes from its enemies by
Giving them a dirty look.
Stinging them with its tentacles.
Squirting out a black liquid that darkens the water.

20. What happens if a starfish is cut into pieces?
It can grow new body parts or grow into new starfish.
It dies.
It’s impossible to cut a starfish into pieces.

21. A mollusk is an invertebrate with a
Backbone.
Soft body.
Two brains.

22. What do lobsters use their legs for? (2)

23. How does a sea anemone use its tentacles to get food? (3)

24. What do most food chains start with and why? (2)

25. Name the different groups of water invertebrate animals in this unit