Temperature’s effect on molecular speed
溫度對分子速度的影響
In this experiment we’re going to find out if temperature affects the speed of molecules in water.
What you will need:
Six clear glasses
Food coloring
Water (cold, room temperature and hot)
Salt
A spoon
►Fill two glasses with cold water, two with water that is about room temperature and two with very hot water. You can use ice or a freezer to get cold water, but when you’re doing the experiment, none of the water should be frozen. Be careful not to burn yourself with the hot water!
►Put about a teaspoon of salt into three of the glasses (one of each temperature). Stir.
►Wait a few minutes for the water you just stirred to stop moving. It’s important for the next step that the water in each glass is absolutely still.
►Add two drops of food coloring to each of the glasses. Observe the way the food coloring moves through the water.(MICHAEL KEARNEY, STAFF WRITER)
在本實驗中，我們要來查明溫度是否會影響水中分子的速度。
所需材料︰
六個乾淨的玻璃杯
食用色素
水（冰水、溫水和熱水）
鹽
一個湯匙
►裝兩杯冰水、兩杯室溫下的水，和兩杯非常燙的熱水；你可以用冰塊或冰庫製成冰水，但在進行實驗時，不能用結冰的水；用熱水的時候要小心別燙傷自己！
►在三杯水中（三種溫度各一）各加入一茶匙鹽巴，然後攪拌。
►等個幾分鐘，等你剛剛攪拌的水都靜止下來；杯中的水需完全靜止後才能進行下一個步驟。
►在六杯水中都各自加入兩滴食用色素，觀察食用色素在水中運動的情形。（翻譯︰袁星塵）
What happens if you add food coloring immediately after you finish stirring the water? What happens if you change the amount of salt you add? Don’t forget to record your observations in your Science Journal.
若你在攪拌後立刻加入食用色素，會發生什麼事？若你改變鹽巴的添加量，會有什麼變化？別忘了在《科學日誌》裡記下你的觀察。
RSS