Grade 3 Science: Animal Classification and Life Cycles
Free Grade 3 Science unit on Animal Classification and Life Cycles: 10 lessons in order. Includes practice questions and answer keys.
10 lessons in this unit
Classifying animals
Learn why scientists group animals and how to sort animals by features such as body covering, limbs and how they move.
Lesson 2Vertebrates and invertebrates
Learn that animals with backbones are vertebrates and those without are invertebrates, and sort examples.
Lesson 3Mammals
Learn the features of mammals: hair or fur, milk for young and warm blood, and compare different mammals.
Lesson 4Birds
Learn the features of birds: feathers, wings, beaks and eggs, and how different beaks and feet suit different lives.
Lesson 5Fish
Learn the features of fish: gills, fins, scales and swimming, and how their bodies suit water.
Lesson 6Reptiles
Learn the features of reptiles: dry scaly skin, lungs, cold-blooded bodies and eggs, and meet snakes, lizards, crocodiles and tortoises.
Lesson 7Amphibians
Learn that amphibians live part of life in water and part on land, have moist skin and change body form as they grow.
Lesson 8Insects
Learn insect features: three body parts, six legs and often wings and antennae, and compare insects with spiders.
Lesson 9Animal life cycles
Learn that animals grow through life cycles, and compare complete metamorphosis in butterflies with incomplete changes in grasshoppers and the growth of mammals and birds.
Lesson 10Animal adaptations
Learn how body parts and behaviours help animals survive, including camouflage, migration and hibernation.