Watch the video and complete the sentences with the words from the box
Video. Timing 1:40 - 2:27.

• vertebrate
• turtles
• reptiles
• amphibians
• characteristics
• air
• scaly

1. There are a lot of different classes of
   [ ], mammals, reptiles are the most well-known vertebrates.
2. There are various
   [ ]that define classes.
3. People don't always understand if some animals are
   [ ]
4. skin and
   [ ] or amphibians.
5. Reptiles breathe
   [ ] and have
   [ ] skin.
6. Among reptiles, only
   [ ] live on land.