Classifying Animals Grade 5 Sunken Lesson Classifying Animals Grade 5 Copyright © 2002 Glenna R. Shaw and FTC Publishing All Rights Reserved Materials from Quia.Com Site of Joseph Marley http://yksd.com/index.html

How Animals are Classified Key Concepts “Biologists classify organisms based on similarities such as appearance, cell structure, hereditary material, and means of getting food and reproducing. The seven levels of classification are kingdom, phylum, class, order, family, genus, and species.

Key Concepts Each level of classification groups organisms that are more similar to each other. The scientific name of an organism is its genus then its species such as: Tyto alba. (barn owl)

Key Vocabulary Classify - group things based on the features they share. Phylum - subdivision of a kingdom (plural is phyla). Genus - A group of living things that includes separate species.

Vocabulary Species - a group of organisms that can breed with each other to produce offspring like themselves. Scientific name - the name given to each species, consisting of its genus and its species.

Vertebrates Key Concepts All vertebrates have an internal skeleton made of bone or cartilage, a backbone, and a skull. A shark is unlike most fish because its skeleton is made of cartilage and most fish have skeletons made of bone.

Key Concepts Many animals go through a metamorphosis; A frog starts out as a tadpole, which grows legs, loses its gills and tail, and develops into an adult frog.

Key Concepts Mammals have two features other vertebrates do not have; mammals have mammary glands to feed their young and mammals have hair to hold in body heat.

Key Vocabulayr Vertebrate - An animal with a backbone. Cartilage - a soft material found in vertebrate skeletons. Vertebra - one of the bones or blocks of cartilage that make up a backbone.

Vocabulary Swim bladder - A gas-filled organ that allows a bony fish to move up and down in water. Amphibian - a vertebrate that lives at first in water and then on land . Metamorphosis - a major change in form that occurs as some animals develop into adults. An example would be a frog. reptile - an egg-laying vertebrate that breathes with lungs.

Vocabulary Cold-blooded - having a body temperature that changes with temperature of surroundings. Warm-blooded - having a body temperature that stays the same. Mammary gland - a milk-producing structure on the chest or abdomen of a mammal.

Invertebrates Key Concepts Invertebrates have many methods of feeding for instance a sponge strains its food particles out of the water that moves through their bodies. Body plans are different in invertebrates; radial symmetry is like spokes on a wheel and bilateral symmetry is a body plan that has identical right and left sides.

Key Concepts There are three main types of worms; flatworms (tapeworms), roundworms (hookworms), and segmented worms (leeches, earthworms). Many invertebrates molt as they grow, for example, arthropod's external skeleton does not grow, so they must shed (molt) their skeleton to grow in size.

Key Concepts Invertebrates have many different ways of movement, for example, Echinoderms attach their tube feet to surfaces and pull themselves along.

Key Vocabulary Invertebrate - an animal that does not have a backbone. Cnidarian - an invertebrate animal that includes jellyfish, corals, and hydras. Radial symmetry - an arrangement of body parts that resembles the arrangement of spokes on a wheel.

Vocabulary Tentacle - an arm like body part in invertebrates that is used for capturing prey. Flatworm - a simple worm that is flat and thin. Bilateral symmetry - a body plan that consists of left and right halves that are the same.

Vocabulary Roundworm - a worm with a smooth, round body and pointed ends. Segmented worm - a worm whose body is divided into sections, such as earthworms or leeches. Mollusk - an invertebrate divided into three parts.

Vocabulary Arthropod - a member of the largest group of invertebrates, which includes insects. Molting - the process by which an arthropod sheds its external skeleton. Crustacean - a class of arthropods that includes crabs, lobsters, crayfish, and sow bugs.

Vocabulary Arachnid - a class of arthropods that includes spiders, scorpions, mites, and ticks. Complete metamorphosis - changes in form during development in which earlier stages do not look like the adult, example is a butterfly. Incomplete metamorphosis - changes in form during development in which earlier stages look like the adult.

Vocabulary Pupa - a stage in the development of some insects that leads to the adult stage. Tube foot - a small structure used by echinoderms for movement.”