1. Lesson 2 – Animals with Backbones
Vocabulary words:
vertebrate- an animal with a backbone

2. Lesson 2 – Animals with Backbones
Vocabulary words:
warm-blooded- a kind of animal whose body temperature does not change much

3. Lesson 2 – Animals with Backbones
Vocabulary words:
cold-blooded- a type of animal that gets its heat from outside its body.

4. Lesson 2 – Animals with Backbones
Vocabulary words:
amphibian- a cold-blooded vertebrate that spends part of its life in water and part of its life on land

5. Lesson 2 – Animals with Backbones
Vocabulary words:
reptile- a cold-blooded vertebrate that has scaly, waterproof skin, breathes air with lungs, and lays eggs.

6. Lesson 2 – Animals with Backbones
Vocabulary words:
bird- a vertebrate that has a beak, feathers, two wings, and two legs

7. Lesson 2 – Animals with Backbones
Vocabulary words:
mammal- a warm-blooded vertebrate with hair or
fur; female mammals
produce milk to feed
their young.

8. Lesson 2 – Animals with Backbones
Vertebrates are grouped into seven classes:
Cartilaginous fish
Jawless fish
Bony fish
Reptiles
Amphibians
Birds
Mammals

9. Lesson 2 – Animals with Backbones
-The largest class of vertebrates are bony fish.

10. Lesson 2 – Animals with Backbones
-Cartilaginous fish (cold-blooded):
Example- Sharks and Rays

11. Lesson 2 – Animals with Backbones
-Jawless fish (cold-blooded):
Example- Lampreys

12. Lesson 2 – Animals with Backbones
-Bony fish (cold-blooded):
Example- tuna and goldfish

13. Lesson 2 – Animals with Backbones
-Reptiles (cold-blooded):
Example- lizards, snakes, turtles, and alligators

14. Lesson 2 – Animals with Backbones
-Amphibians (cold-blooded):
Example- frogs, toads, and salamanders

15. Lesson 2 – Animals with Backbones
-Birds (warm-blooded):
Example- Bald Eagle, Cardinal, Robin

16. Lesson 2 – Animals with Backbones
-Mammals (warm-blooded):
Example- Humans, Kangaroos, Sheep, Bats

17. Lesson 2 – Animals with Backbones
-The 3 main groups of mammals are classified by how young are born.
1. Mammals that lay eggs: duck-billed platypus and the spiny anteater

18. Lesson 2 – Animals with Backbones
2. Mammals with Pouches: Kangaroos, kaolas, and opposums.

19. Lesson 2 – Animals with Backbones
3. Mammals that develop inside: Sheep, bats, apes, and all others