博世凱每日英語閱讀:科學小實驗之製作彈力球Make a Super Ball! (雙語+音頻)

2021-02-28 博世凱英語
What makes something bounce? Here's a recipe for finding the bounce in a combination of ingredients.

有什麼東西能促使物體有彈性?我們在多種配料中找到了一個配方。

 

What You Will Need 你會需要:

borax powder 硼砂粉

water 水

food coloring 食用色素

glue 膠水

cornstarch 玉米澱粉

bowls 碗

 

STEP ONE 步驟一

Make borax solution. Combine two tablespoons of warm water and 1/2 teaspoon of borax powder. Stir to dissolve the borax. Add food coloring, if desired. You'll have enough to make seven or eight balls.

製作硼砂溶液。把兩湯匙溫水和1/2茶匙的硼砂粉融合,攪拌以溶解硼砂。如果需要,添加食用色素。這些用量足夠製造七個或八個彈力球。

STEP TWO 步驟二

Use a different bowl for each ball. Pour in one tablespoon of glue. Add 1/2 teaspoon (2.5 mL) of the borax solution and one tablespoon of cornstarch. Do not stir. Allow the ingredients to interact on their own for ten to fifteen seconds.

每個球用不同的碗。倒入一湯匙膠水。加入1/2茶匙(2.5 mL)的硼砂溶液和一湯匙玉米澱粉。不要攪動。讓各種成分自行混合十到十五秒。

STEP THREE 步驟三

Then stir them together to fully mix. Once the mixture becomes impossible to stir, take it out of the bowl and start molding the ball with your hands. The ball will start out sticky and messy, but it will solidify as you knead it. Once the ball is less sticky, go ahead and bounce it!

然後將它們攪拌在一起以充分混合。一旦混合物變得無法攪拌,將其從碗裡中取出,用手把混合物搓成球形。一開始會粘乎乎的,但隨著你的揉捏,彈力球會逐漸凝固。一旦球不那麼粘了,就讓它彈起來吧!

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