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”

Snail’s 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 can’t. 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 don’t 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 animal’s 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 (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

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