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 InsectsEight legsTwo body sectionsEat insectsSpin silkMake webs

Six legsThree body sectionsMost eat plantsMany have wingsHave 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