第九课

   Unit 3 Soil and rock第三单元土壤与岩石

1、Nature gives us the boundless fertile soil to create a variety of strange peaks and rocks. How much treasure has the soil and rock dedicated to us? How should we cherish them?大自然赋予了我们一望无垠的肥沃土壤的造化出林林总总的奇峰异石。土壤与岩石为我们奉献了多少宝藏？我们该如何珍惜它们呢？

9 the content of soil土壤的成分

Fall red is not merciless thing, turn into spring mud more protect flower'petals fall down, will gradually become a component of the soil what is the composition of the soil?

“落红不是无情物，化作春泥更护花’’花瓣落下来，会逐渐变成土壤的一种成分土壤的成分有哪些？

Soil collection is to be accompanied by parents采集土壤要有家长陪同

Task Card任务卡

Collect the soil and take it to the classroom for observation.采集土壤，带到课堂上观察。

Activity process活动过程

Look at the soil. What's the discovery?观察土壤，有什么发现？

I feel the soil a little wet我感觉土壤有点湿。

Put the soil in the water把土放进水中，

I observed. ... .我观察到。。。。。

I After a for a while,静置一段时间后，

I found …我发现·......

I smell it. ... ... .我闻到 .......

There may be some in the soil. .......土壤里可能有 .......

Use alcohol lamps使用酒精灯

Be safe要注意安全

Information Card资料卡

How to Use Alcohol Lamp酒精灯的使用方法

flame envelope外焰

inner flame 内焰

flame core 焰心

1. remove the lamp cap and put it on the table取下灯帽，扣放在桌面上。

2. Light the alcohol lamp from the bottom up.自下而上点燃酒精灯。

3Heat it up with an external flame.用外焰加热。

3. Cover the wine lamp with a lamp cap. Open the cover and cover it用灯帽盖灭酒精灯。盖灭后打开，再盖上。

Inquiry skills探究技能

In the experiment of heating soil, it is reflection to think about what is successful and what practices need to be improved. 在加热土壤的实验中，思考哪些做法是成功的、哪些做法是需要改进的，就是在反思。

The soil has sand, clay, air, water, humus and other components. Humus is mainly transformed after the decay of animal and plant residues. 土壤里有沙、黏土、空气、水、腐殖质等成分。腐殖质主要是动植物残体腐烂后变成的。

Outreach activities拓展活动

Consult the data to understand how the soil is formed.查阅资料，了解土壤是怎样形成的。