Lesson 2 Animals, Big and Small
언어형식
■명사를 뒤에서 꾸미는 분사
Look at the sun rising over the sea.
■접속사 since와 though
Since it rained heavily, the station was closed.
Though it rained heavily, the trains were on time.
The Science Project: The Amazing Ants
For the science project, our group has chosen very special insects.
ㆍThey are very social.
ㆍThey are as old as the T-Rex.
ㆍThey appear in Aesop’s stories.
ㆍThey use a special chemical to communicate.
Can you guess what they are? Yes, the answer is ants.
We want to share with you what we have learned about these insects.
The Amazing Ants
How Many Ants Are on Earth?
We often see ants come out of nowhere.
Like humans, they live almost everywhere in the world, except a few extremely cold places including Antarctica.
As of 2018, there were over 7 billion people on Earth. Then, how about ants?
According to scientists, there are about one million ants for every human in the world.
Though each ant hardly weighs anything, one million ants are as heavy as a human being weighing about 62 kilograms.
What Is the Ant Society Like?
Ants live in colonies which have lots of residents living together.
Within a colony, there are usually three different types of ants.
There is the queen, and what she does her entire life is lay eggs.
The second type of ant is the male that helps the queen produce these eggs.
The third type of ant is the worker.
Worker ants are all female and do very important jobs, like caring for eggs, defending the colony, and collecting food.
How Do Ants Communicate?
Though ants do not speak like humans, they actually have a “language.”
Ants produce a chemical called a pheromone to communicate with one another.
By using the chemical, they can exchange information about food or danger.
Ants also use touch for communication. For example, if an ant finds food, it passes on the good news by rubbing its body on its neighbor.
Since an ant has legs covered with very sensitive hairs, it can sense even the smallest touch.
Fun Facts About Ants
01 Some queen ants live up to 30 years.
02 Some ants can carry things that are 50 times their own body weight.
03 Ants do not have lungs but breathe through small holes in their bodies.
04 An ant has two stomachs. One stomach holds food for itself, and the other holds food to share with others.
05 Most ants can swim and live 24 hours underwater.
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