Forms of Life

周五

Level3-Unit3-Part1-[3]Vocabulary:Forms of Life

1. Mammals are covered by hair or fur, have a backbone and are warm-blooded.

2. All female mammals produce milk for their young.

3. Reptiles 爬虫类 are covered by scales鳞屑  and include snakes, lizards and turtles.

4. Reptiles have a backbone and are cold-blooded, which means they often rely on external sources of heat. 外部热源

5. Birds are covered by feathers and are warm-blooded.

6. Most birds can fly and many types of birds migrate great distances.

7. Most insects 昆虫such as ants and bees have a small, 3-part body with 3-pairs of legs.

8. Some insects, like mosquitoes, spread diseases that cause the deaths of many humans.

9. Unlike animals, plants get the energy that they need from the sun.

10. Plants convert 转化 light energy, along with carbon-dioxide and water, into chemical energy.

听说部份：

mammals include some of the most intelligent animals on earth such as elephants and human being.

most mammals live on land ,but some live in the sea.

Mosquitoes cause the deaths of more humans than any other animal.