Curriculum Resources
Take learning to the next level and transform the way you teach with a vast library of ready-to-use, standards-aligned, adaptable curriculum resources. The resources listed below are either available with an Online Learning Subscription which allows you to instruct, assess and track student performance or as individual hands-on classroom resources which can be purchased. Choose from Multimedia Lessons, Curriculum Mastery Games, Flip Charts, Visual Learning Guides, Flash Cards, Vocabulary Cards, and Curriculum Modules available on our online store.
  • Select By Standard
  • Curriculum Resources
    • General Science
    • Life Science / Biology
    • Human Body
    • Earth Science
    • Physical Science
    • Chemistry
    • Math
    • Language Arts
    • Social Studies
FREE Trial to
Online Learning
Shop for printed
Flip Charts

Invertebrates - Animals Without Backbones

Science, Grade 4

sand dollar starfish clam foot hard shell earthworm dragonfly flat worm lobster spider hydra tentacle bud - new hydra Scientists classify animals into two major groups, vertebrates and invertebrates. Invertebrates are animals that do not have a backbone. Many invertebrates do not have hard body parts either, though some do. There are many different invertebrates living on Earth. In fact, most of the organisms living on Earth are invertebrates. Scientists classify invertebrates into broad groups called phyla, based on their symmetry and body plan. The major groups of invertebrates are cnidarians, echinoderms, mollusks, worms, sponges, and arthropods. Jellyfish (a cnidarian) have soft bodies and long stinging tentacles that are poisonous. Sea anemones look like flowers in the sea and live attached to objects on the ocean floor. Coral reefs are a mass or ridge of living coral that need sunshine and warm waters to survive. Coral reefs live in warm, shallow sea waters. Coral reefs provide a protective living environment for a large variety of invertebrate marine life. Crustaceans are arthropods and include crabs and lobsters. They have hard external shells that protect their soft bodies. They show bilateral body symmetry. nautilus - mollusk jellyfish fly shrimp - crustacean octopus- mollusk Cnidarians include hydra, jellyfish, and sea anemones. All cnidarians have stinging cells which they use to catch food. Arthropods are the largest animal phylum. Arthropods’ skeletons are on the outside of their bodies. All arthropods have segmented bodies and jointed legs. Insects, crabs, centipedes, millipedes, and spiders are all examples of arthropods. Worms are invertebrates that have long, soft bodies and no legs. Roundworms, such as earthworms, have segmented bodies which mean their bodies are divided into sections. Flatworms, such as tapeworms, have flat simpler bodies. Mollusks have soft bodies and most have shells. Snails, clams, and octopus are types of mollusks. Mollusks move by using a structure called a foot. Its foot produces slime that helps them move easier along the ground. Echinoderms are invertebrates that live in the ocean. Examples include starfish, sea urchins, sand dollars, and sea cucumbers. Echinoderms show radial symmetry. Invertebrates - Animals without Backbones © Copyright NewPath Learning. All Rights Reserved. 94-4402 Animal Kingdom Invertebrates Phylum Cnidarians Arthropods Worms Mollusks Echinoderms Porifera
Describe the following: Cnidarians ________________________________________________ __________________________________________________________ Arthropods _______________________________________________ __________________________________________________________ Roundworms ______________________________________________ __________________________________________________________ Flatworms ________________________________________________ __________________________________________________________ Mollusks _________________________________________________ __________________________________________________________ Echinoderms ______________________________________________ __________________________________________________________ Crustaceans _______________________________________________ __________________________________________________________ What are invertebrate animals? _____________________________________ _________________________________________________________________ _________________________________________________________________ How are invertebrate animals classified? ______________________________ _________________________________________________________________ _________________________________________________________________ What is a Coral reef? _________________________________ ___________________________________________________ ___________________________________________________ Key Vocabulary Terms anemone mollusk arthropod nautilus classify octopus cnidarian roundworm crustacean shrimp echinoderm spider flatworm sponge insect starfish invertebrate symmetry jellyfish tentacles Animal Kingdom Invertebrates Phylum Cnidarians Arthropods Worms Mollusks Echinoderms Porifera Invertebrates - Animals without Backbones © Copyright NewPath Learning. All Rights Reserved. 94-4402 \|xiBAHBDy01719mzV
© Copyright 2012-2017 NewPath Learning. All Rights Reserved. Privacy Notice * Terms of Use