Invertebrates

Introductory Video

Lesson 3.1 God’s Design of Invertebrates Objective: Students will classify animals as vertebrates or invertebrates and examine the design of specific invertebrates.

Review *What is a vertebrate? *How do scientists classify vertebrates? *Why is a snake not an amphibian? *Why is a fish not a reptile?

Invertebrates An invertebrate is an animal without a backbone.

God’s Special Design God designed special protection for animals without backbones. *Snails – shells to protect their soft bodies *Crabs and Ladybugs – outer skeletons to protect their bodies *Earthworms – can burrow through the soil in many different directions

Jellyfish Jellyfish have tentacles with stinging cells that allow them to catch their food. Jellyfish do not have backbones.

Starfish Starfish have spiny skin and rows of tubes on their feet that help them crawl and also grip their food. If an arm is broken off it grows a new one. Starfish do not have backbones.

Slugs Slugs are related to snails. They often climb trees in search of food and can descend from a tree by hanging from a thread of mucus. Slugs do not have backbones.

Octopus Octopuses can change the color and texture of their skin to hide from enemies. They can squirt out a cloud of ink to help them hide. Octopuses do not have backbones.

Butterflies Butterflies have antennae that help them smell and hairs on their feet that help them taste. Butterflies do not have backbones.

Lesson 3.2 Earthworms Objective: Students will make predictions about earthworms, observe their behavior, and record data.

Scientific Method Video

Scientific Method Steps 1. Identify a question to answer. 2. Make a hypothesis to say what you think will happen in an experiment. 3. Plan ways to test your hypothesis. 4. Conduct the experiment. 5. Observe and collect data. Hypothesis: a prediction or statement that can be tested to tell if it is true.

Lesson 3.3 Spiders Objective: Students will differentiate between spiders and insects. They will identify the body parts of a spider.

Classifying Invertebrates

Spiders Insects Eight legs Two body sections Eat insects Spin silk Make webs Six legs Three body sections Most eat plants Many have wings Have antennae Similarities and Differences

Lesson 3.4 Ants Objective: Students will identify the parts of an ant and discuss how they are uniquely designed to do work.

Introductory Video The leaf cutter ant

Did you know??? Ants are known as social insects because they live in organized communities. A community of ants is called a colony. Each colony has a queen whose job is to lay eggs. Most of the ants in a colony are female and are called workers. Male ants are called drones. Ants don’t have lungs, they breathe through small air tubes along the sides of their abdomens.

God’s Special Design Antennae – these are used to taste, smell, and hear. Spiracles – These are air tubes that ants use to breathe.

God’s Special Design Mandibles – These jaws are used for eating, as tools for making tunnels, and as weapons. Sting – Some ants have a sting at the end of their body. They can use this against enemies.

Talk About It What is another way an ant sets a good example for us to follow?

Lesson 3.5 Snails Objective: Students will identify the body parts and characteristics of a snail.

Mollusks Mollusks are soft bodied invertebrates that usually have shells. Clams, snails, and scallops are mollusks.

Snails Shell – this protects the snail Foot – this helps the snail move

Snails Eyespots – these help the snail see Tentacles – these help the snail feel things. Mucus – snails release this sticky liquid that helps them slide along the ground

Lesson 3.6 Chapter 3 Review Objective: Students will classify animals as either vertebrates or invertebrates. In a review, students will identify characteristics of earthworms, insects, spiders, and mollusks.

What is a prediction that can be tested called? Hypothesis What is a large group of ants that live and work together called? Colony

What is an animal without a backbone called? Invertebrate Name an animals that loosens soil. Earthworm

How many legs do spiders have? Eight How many legs do insects have? Six