| Term | Definition |
|---|
| down feather | The short, fluffy feathers that trap heat and keep a bird warm |
| canine | Sharply pointed teeth that stab food and tear into it |
| monotreme | A mammal that lays eggs. The Duck Billed Platyus and Echidnea are two examples. |
| lift | An upward force on an object that results from the difference in pressure between the upper and lower surface of the object |
| marsupial | A mammal whose young are born alive at an early stage of devlopment, and which usually continue to develop in a pouch on their mother's body |
| molar | Teeth that, along with the premolars, grind and shred food into tiny bits |
| bird | An endothermic vertebrate that has feathers and a four-chamberd heart, and lays eggs |
| crop | A bird's internal storage tank that allows it to store food inside its body after swallowing it |
| premolar | Teeth that, along with molars, grind and shred food into tiny bits. |
| incisors | Flat-edged teeth used to bite off and cut parts of food |
| mammal | An endothermic vertebrate with a four-chambered heart, skin covered with fur or hair, and has young fed with milk from the mother's body |
| placental mammal | A mammal that develops inside its mother's body until its body systems can function independently. |
| contour | A large feather that helps give shape to a bird's body |
| gizzard | A thick-walled, muscular part of a bird's stomach that squeezes and grinds partailly digested food |
| insulator | A material that does not conduct heat well and thus helps to prevent heat from escaping |
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