高校问答黑暗游侠高清壁纸:Science questions`--!!!--dont translate~ANSWER.PLZ~!
来源：百度文库 编辑：高校问答 时间：2024/04/28 23:45:03
2. Imagine thay you could take all the students to your class to the gye to help you illustrate to the process of dissolving. What instructions might you give them?
3. Using what you know about particles, predict two ways you could shorten the time it takes to dissolving sugar in a drink. Explain your predictions.
3. Using what you know about particles, predict two ways you could shorten the time it takes to dissolving sugar in a drink. Explain your predictions.
This simple experiment gives students a basic understanding about solutions.
Materials:
Salt
Water
Transparent plastic cup - 1
Procedure:
2
Fill the cup with water.
Add two spoons of Salt in the water and stir thoroughly.
Observer that salt dissolves in water and seems to disappear. What you have in the cup is Salt Water Solution.
Put small amount of Salt Water Solution in a dish and let the water evaporate.
Observe that the Salt is left behind.
3 a) increase the temperature
b) stir the solution