4/27- 7 th Grade Agenda Learning Objective: Learn about Snails & arthropods Collect HW: Reading & Notetaking 207 208 Visit from the Wild Life Refuge Center Textbook Reading 434 436 HW: Reading & Notetaking 210 211 Reflection Prompt: Write 3 questions you have about snails. Reflection Prompt: Write 3 questions you have about Fennec fox, Coatimundi, Tortoise and Snakes. What are Gastropods? Gastropods are both herbivores and carnivores Gastro = stomach Pod = Foot Snails Radula Tiny teeth act like sandpaper and scrape food from leaf and ground How do you tell a female snail from a male snail? You cant. They are hermaphrodites. They have both male and female sexual organs. Baby Snails are born with shells Snail Eggs Baby Snail What are Bivalves? Mostly Omnivores Bi = Two Valve = Shell or Opening How clams dig in Most Clams dont have eyes But scallops has 50 100 simple eyes on the edges of the shell. What are Cephalopods? Cephalo = Head Pod= Foot What are Arthropods? Insects Spiders Scorpions Lobster Crab Shrimp Centepedes Arthro = Jointed Pod = Foot Comparing Arthropods What are Crustaceans? two or three body sections five or more pairs of legs two pairs of antennae. Crustaceans What is Metamorphosis? Process in which an animals body undergoes dramatic changes during its life cycle This is a picture of a Crab Larva What are Arachnids? Ticks, Mites, Scorpions & Spiders two body sections four pairs of legs Which type of animal is most numerous in the world? Insects! 73% of all animal species are insects. What are the characteristics of insects? Invertebrates (Doesnt have a backbone) Exoskeleton (Exo = outside, skeleton) Arthropod (Arthro = joined, Pod = Leg) 3 pairs of legs 1 pair of antennae Most insects have wings What are Insects Three Body Sections? Head Thorax Abdomen