4/29 & 4/30 - 7th Grade Agenda Learning Objective: Learn about Snails & insects Collect HW: Reading & Notetaking 207 – 208 Snail Lab Video: Life in the Undergrowth Textbook Reading 434 – 438 HW: Reading Notetaking 209 – 212

Reflection Prompt: Write 3 facts that you know about mollusks.

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

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

Some arthropods have blue blood Horseshoe crabs have blue blood The have hemocyanin (which contains copper) instead of hemoglobin (which contains iron) in their blood They are more closely related to spiders and scorpions Has not changed much in 450 million years

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. Which type of animal is most numerous in the world?

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

What is found on an insect’s Head? Head: Most of an insect’s sense organs, such as the eyes, mouth and antennae, are located on the head.

What is found on an insect’s Thorax? Thorax: An insect’s midsection is the section to which wings and legs are attached.

What is found on an insect’s Abdomen? Abdomen: Inside the abdomen are many of the insect’s internal and sexual organs. Small holes on the outside of the abdomen allow air, which contains oxygen, to enter the body.

How big is the world’s largest Insect Titan Beatle 7 inches long

Can you spot an insect here? Dead Leaf mantis Sand Grasshopper

Can you spot an insect here? Walking stick insect Grasshopper