1. 5/2 - 7th Grade Agenda Collect Chap 11 Section 3 Reading Guide
Earthworm observations
Mollusks & Arthropods
Video: Life in the Undergrowth
Textbook Reading 431 – 432
HW: Reading & Notetaking 207– 208

2. Reflection
Prompt: Write 3 questions you have about insects.

3. What are Gastropods? Gastro = “stomach” Pod = “Foot”
Gastropods are both herbivores and carnivores

4. Snail’s Radula
Tiny teeth act like sandpaper and scrape food from leaf and ground

5. Valve = “Shell or Opening”
What are Bivalves?
Bi = “Two”
Valve = “Shell or Opening”
Mostly Omnivores

6. How do you tell a female snail from a male snail?
You can’t. They are hermaphrodites. They have both male and female sexual organs.

7. Baby Snails are born with shells
Snail Eggs Baby Snail

8. How clams dig in

9. Most Clams don’t have eyes
But scallops has 50 – 100 simple eyes on the edges of the shell.

10. What are Cephalopods?
Cephalo = “Head”
Pod= “Foot”

11. What are Arthropods? Arthro = “Jointed” Pod = “Foot” Insects Spiders
Scorpions
Lobster
Crab
Shrimp
Centepedes

12. Comparing Arthropods

13. What are Crustaceans? two or three body sections
five or more pairs of legs
two pairs of antennae.

14. Crustaceans

15. What is Metamorphosis?
Process in which an animal’s body undergoes dramatic changes during its life cycle
This is a picture of a Crab Larva

16. What are Arachnids? Ticks, Mites, Scorpions & Spiders
two body sections
four pairs of legs

17. Which type of animal is most numerous in the world?
Insects! 73% of all animal species are insects.
Which type of animal is most numerous in the world?

18. What are the characteristics of insects?
Invertebrates (Doesn’t have a backbone)
Exoskeleton (Exo = outside, skeleton)
Arthropod (Arthro = joined, Pod = Leg)
3 pairs of legs
1 pair of antennae
Most insects have wings

19. What are Insect’s Three Body Sections?
Head
Thorax
Abdomen