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21英语教师网 > 备课资源 > 拓展阅读 > 正文
Forest in the sea
作者:21ST    来源:少年英文报第134期    日期: 2010-11-02
牛津版初一年级:Sea water and rain water, Forests and land

关键词:water in oceans, saving water, how people use water, forest and land

话题归类:自然Nature



Like a rainforest on land, there is a kelp forest in the sea. It is home to many sea animals. Do you know anything about kelp? It is a kind of brown seaweed. It holds on to the rocks with its strong roots.

海带是非常有营养的食物,它不仅含有丰富的人体需要的蛋白质、碘、钙、铁,还有很多维生素呢!

Giant kelp

Giant kelp is the largest of all sea plants. It grows in cool waters. But it needs sunlight to grow. It can grow to a length4 of over 60 metres. Some animals like living in the forest of giant kelp. They also like to eat kelp in the sea. Do you know these animals? They are leafy sea dragons (叶型海龙).

Did you know?

Giant kelp is one of the world's fastest growing plants. Kelp leaves can grow up to 50 centimetres a day.

Hands-on science

漂浮的鸡蛋

What we need:

an uncooked egg

a small spoon

a glass

fresh water

salt

Step 1

Fill the glass half full with fresh water.

Step 2

Put an egg into the glass. (What happens to the egg?)

Your answer:

A. 漂浮 B. 沉底

Take the egg out of the glass. Dry the egg to use it again.

Step 3

Put 10 spoons of salt into the water.

Mix the salt and the water.使盐粒完全溶解。

Step 4

Put the egg into the salt water. (What happens to the egg?)

The egg floats in the salt water. Why? 盐水的浮力要比淡水大。

生词大本营
kelp 海带 seaweed 海藻 giant 巨大的 length 长度
dry 擦干 mix 混合,搅拌 float 飘浮



关键词:牛津版 初一 Sea water and rain water, Forests and land 自然Nature



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