UC知道一篇学前教育的英语化学教案 求翻译
来源：百度知道 编辑：UC知道 时间：2024/05/05 06:08:50
Acidic and Basic Test
Suggested Grades -1
Objective Students will be introduced to acidic and basic liquids through this simple test.
Materials
clear plastic cups
a head of purple cabbage coarsely shred.
spoons
paper towels
*safety glasses
white vinegar
ammonia
water
Method Can do this activity as a demonstration or in class groups. Take extra care with the ammonia, though.
Boil the shredded cabbage in a 1/2 a pot of water for about ten minutes. Strain and refrigerate until ready to use.
Fill cups about half way with each liquid.
Add one teaspoon of the boiled cabbage to each glass. What happened?
Cabbage should change colour:
vinegar - red - acid
ammonia - green - base
water - purple - neutral
Based on these colour changes, try to predict whether other liquids are acidic or basic, then add the
Suggested Grades -1
Objective Students will be introduced to acidic and basic liquids through this simple test.
Materials
clear plastic cups
a head of purple cabbage coarsely shred.
spoons
paper towels
*safety glasses
white vinegar
ammonia
water
Method Can do this activity as a demonstration or in class groups. Take extra care with the ammonia, though.
Boil the shredded cabbage in a 1/2 a pot of water for about ten minutes. Strain and refrigerate until ready to use.
Fill cups about half way with each liquid.
Add one teaspoon of the boiled cabbage to each glass. What happened?
Cabbage should change colour:
vinegar - red - acid
ammonia - green - base
water - purple - neutral
Based on these colour changes, try to predict whether other liquids are acidic or basic, then add the
酸性和碱性测试
建议等级-1
通过这个简单的测试学生将推出酸性和碱性液体。
材料
透明塑料杯
一个紫甘蓝头粗糙可言。
勺子
纸巾
*安全眼镜
白醋
氨
水
方法只能作为一个示范或在课堂上组织这项活动。使用氨格外小心。
煮的1 / 2切碎的白菜水锅约10分钟。应变和冷藏，直到准备使用。
填充液体每杯约一半。
添加一个煮白菜的每个玻璃茶匙。发生了什么？
白菜应改变颜色：
醋-红-酸
氨-绿色-基地
水-紫-中立
这些颜色变化的基础上，尝试预测是否有其他液体酸性或碱性，然后添加煮白菜发现。扩展：制作您自己的试纸。
纸巾或浸泡在紫甘蓝汁白咖啡过滤器。
让干燥，切成。加沙地带应该改变颜色根据液体它的把手伸进类型。
如果你能给30分的话，我现在马上就给你翻译
酸性和碱性测试显示，学生年级-1目的将推出酸性和碱性液体，通过这个简单的测试。材料透明塑料杯的紫甘蓝切丝头粗糙。勺子纸巾*安全眼镜白醋氨水方法可以做到这一点活动作为一个在课堂上示范或团体。 Take extra care with the ammonia, though. Boil the shredded cabbage in a 1/2 a pot of water for about ten minutes.就以氨格外小心，但。煮熟的1 / 2的切碎的白菜约10分钟的水锅。 Strain and refrigerate until ready to use. Fill cups about half way with each liqu