| A | B |
|---|
| fish traits | cold-blooded, gills, scales, eggs |
| amphibian traits | cold-blooded, gills/lungs, eggs |
| reptile traits | cold-blooded, lungs, eggs |
| bird traits | warm-blooded, lungs, eggs |
| mammal traits | warm-blooded, lungs, live birth |
| vertebrate | animal with a backbone |
| invertebrate | animal without a backbone |
| breathing with gills | how fish get oxygen in water |
| breathing with lungs | how animals get oxygen from air |
| three groups of reptiles | lizards & snakes, turtles & tortoises, and crocodilians |
| three groups of amphibians | newts/salamanders, frogs/toads, caecilians |
| three groups of mammals | monotremes, marsupials, & placentals |
| monotreme traits | mammals that lay eggs |
| marsupial traits | mammals that have pouches |
| placental traits | babies grow inside the mother |
| evolution | how new species develop from old ones over long periods of time |
| metamorphosis | change in body form from one life stage to the next |
| life cycle | all the stages in an animal's life |
| cell | The smallest part of a living thing |
| zoologist | A scientist who studies animals |
| cold-blooded animals | fish, amphibians, and reptiles |
| warm-blooded animals | birds and mammals |
| animals with lungs | reptiles, birds, and mammals |
| animals which lay eggs | fish, amphibians, reptiles, and birds |
| scientific theory | an idea which explains all the facts |
