WHY    IS   THE　　ＳＵＮ　　IMPORTANT  ？

  The   sun  is  huge  ,  hot  ,  bright  star  .  It  is  important  because  without  it  there  would  be  no   life   on  earth  .  The   sun  gives   us  light  and   heat  .

All living things need light and heat from the sun to live. Plants need light and heat to grow. They use the  light from the sun to make food. We cannot make our own food, but plants can. All the food we eat comes  from plants in a food chain (链) which starts with the sun.

For example,  Animals need sunlight, too. Just like us, their food comes from a food chain which begins with the sun  and the plants. 　　

     sun→ leaf→ caterpillar (毛虫)→bird 　　

     sun→ seaweed (海藻)→small fish→ whale (鲸) 　　

 Sunlight means we can see during the day. If there was no sun, it would be dark all the time. Even when  the sky is cloudy, the sunlight is very strong and it shines through the clouds.