第三、四课

第三课 塑料 

Lesson three Plastics

活动准备Activity Preparation

1、准备一些材料来研究塑料吧

Prepare some materials to study the plastic

2、塑料杯 玻璃杯 布袋 塑料袋

Plastic cups, glasses, cloth bags and plastic bags

活动过程Activity process

3、他们是用什么材料制成的？

What materials are they made of?

4、这个水桶是用塑料制成的。

This bucket is made of plastic。

5、我还知道......

I also know … … …

6、塑料是一种常见材料

Plastic is a common material that is

7、观察塑料，有什么发现？

Look at the plastic, what do you find?

8、塑料杯更轻。

the plastic cup is lighter.

探究技能 Inquiry skills

9、用观察的方法找出塑料与其他材料相同点和不同点，就是在比较

倒进热水，矿泉水瓶会......

To find out the similarities and differences between plastics and          other materials by observing is to compare Pour in hot water, water        bottles will...

拓展活动 Outreach activities

10、了解塑料对我们的生活有什么影响。

Understand how plastic affects our lives.

第四课 金属

Lesson four Metal

活动准备Activities to prepare 

1、准备一些材料来研究金属吧。

Prepare some materials to study metals.

2、铜棒Copper bar  铁棒iron bar  铝棒aluminum bar          砂纸sandpaper   小锤子small hammer

活动过程Activity process

3、它们是用什么材料制成的？

What materials are they made of?

4、这个勺子是用铁制成的。

This spoon is made of iron.

5、我还知道.......

I also know that .......

6、铜、铁、铝都是金属，金属可以做材料。

Copper, iron and aluminum are all metals, and metals can be used as materials.

7、观察金属，有什么发现？

Look at the metal. What do you find?

8、用砂纸打磨，我发现.......

Sandpaper, I found .......

9、用锤子敲一敲。

Knock it with a hammer.

10、铝条被....

Aluminum strip quilt ....

拓展活动Outreach activities 

11、观察家中的物品，找一找哪些是用金属制成的。

Look at the things in your home and find out which ones are made of metal.