How animals live?

    

    Animals can be grouped by their traits. A trait is the way an animal looks or acts. Animals get traits from their parents. Traits can be used to group animals. Animals with backbones belong to one group. A vertebrate is an animal with a backbone. Vertebrates' backbones grow as they get older. Fish, snakes, and cats are all vertebrates. Vertebrates can look very different.

    Fish are vertebrates that live in water. Fish have scaly skin. They breathe through gills. Amphibians are vertebrates. They can live on land. Amphibians breathe through gills when they are young. They also get oxygen through their skin. As they grow, they develop lungs. Toads and frogs are amphibians. 

    Reptiles are vertebrates with scaly skin. Crocodiles and alligators are reptiles. They breathe through lungs. Snakes, lizards, and turtles are reptiles too. Birds are vertebrates that breathe through lungs. They have bills instead of teeth. Wings and light bones help most birds fly. Their feathers keep them warm.

   Mammals are vertebrates. Mammals have hair on their bodies. This keeps them warm. They breathe through lungs. Mammals feed milk to their young.

Vocabulary:

trait            :        đặc điểm

acts            :        hành vi

backbones :        xương sống

vertebrate  :        động vật có xương sống

scaly skin  :        da có vẫy

breathe      :        thở     

                                                                                                                                                    gills           :        mang                

amphibians         :        động vật lưỡng cư

develop lungs     :        phát triển phổi

reptiles      :        bò sát

mammals  :        động vật có vú

feed           :        cho ăn

28/8/2021

Levic