1. How do we classify vertebrates? SCIENCE CH. 1 L. 2 NOTES PG. 10 - 17

2. Vocabulary  Vertebrate – animal with a backbone

3. Animals  Multicellular – made of more than one cell  Cannot make their own food  Animals must eat other organisms for energy  Can move on their own  Two phyla of animals:  Vertebrates – have a backbone  Invertebrates – don’t have backbone

4. Phylum Chordata (Vertebrates) Fish Birds Amphibians Reptiles Mammals

5.  Have hair/fur on their bodies  Warm-blooded – body temp. is nearly the same all the time  Live birth  Mothers nurse (feed) young with milk  Young are born looking like the parents

6. Reptiles  Have tough, dry skin with scales  Cold-blooded – body temp. will change with the surrounding environment  Hatch from hard-shelled eggs  Survive on their own from birth  Young are born (hatched) looking very similar to parents

7. Birds  Have feathers and beaks  Warm-blooded  Hatch from hard-shelled eggs  Parents take care of young  Young are born looking somewhat like parents

8. Amphibians  Soft, moist skin  Can absorb water and oxygen  Cold-blooded  Hatched from soft-shelled eggs  Survive on their own from birth  Born looking nothing like parents  Metamorphosis – more complicated life cycle

10. Fish MMost have scales AAlso a slimy coating to help water flow past them CCold-blooded HHatch from soft-shelled eggs SSurvive on their own from birth LLook somewhat like parents when born OOnly class of vertebrates that only lives in water CCan move by bending body or just moving fins

11. Dinosaur Fossils  In early 1800s, scientists began classifying fossils of bones  Compared fossil bones to animal bones today.  Many were like today’s lizards  Because of the huge bones, they were called “dinosaurs”  Dinosaur = “terrible lizard”  Most dinosaurs were about 3 ft. long

12. Comparing Dinosaurs Dinosaur  Legs go down from bodies Today’s Lizards  Legs go out from bodies Scales Backbones Many had 4 legs