Grade 5 Quiz: Crustaceans, Mollusks, and Cnidarians

Instructions: Choose the correct answer from the options provided.

1. Which of the following is a characteristic of crustaceans? a) They have a soft body covered by a hard shell. b) They have a segmented body and jointed appendages. c) They have a stinging tentacle to capture prey.

2. Which of the following is an example of a crustacean? a) Octopus b) Lobster c) Jellyfish

3. What is the main difference between crustaceans and mollusks? a) Crustaceans have a soft body covered by a hard shell, while mollusks have a hard exoskeleton. b) Crustaceans have a segmented body and jointed appendages, while mollusks have a soft body and a muscular foot. c) Crustaceans have a stinging tentacle to capture prey, while mollusks have a radula for feeding.

4. Which of the following is an example of a mollusk? a) Crab b) Snail c) Sea anemone

5. What is the main characteristic of cnidarians? a) They have a soft body covered by a hard shell. b) They have a segmented body and jointed appendages. c) They have stinging cells called nematocysts.

6. Which of the following is an example of a cnidarian? a) Shrimp b) Clam c) Sea jelly (jellyfish)

7. How do crustaceans breathe? a) Through gills b) Through lungs c) Through their skin

8. How do mollusks breathe? a) Through gills b) Through lungs c) Through their skin

9. How do cnidarians breathe? a) Through gills b) Through lungs c) Through their skin

10. Which of the following is not a characteristic of mollusks? a) They have a soft body and a muscular foot. b) They have a hard exoskeleton. c) They have a radula for feeding.

Answer Key: 1. b) They have a segmented body and jointed appendages. 2. b) Lobster 3. b) Crustaceans have a segmented body and jointed appendages, while mollusks have a soft body and a muscular foot. 4. b) Snail 5. c) They have stinging cells called nematocysts. 6. c) Sea jelly (jellyfish) 7. a) Through gills 8. a) Through gills 9. c) Through their skin 10. b) They have a hard exoskeleton.