Question: Adam's friend gave him a cup filled with a water solution. Adam did not know what solid material was used to make it. He evaporated the solution and found crystals in the dish after all of the water was gone. How will the crystals help him decide what solid material was used to make the solution?
Reference answer: Crystals of different materials have different shapes. So the shape will help identify the material.

Student answer: He could see what solid used and he will find out what it is.

Student answer: He should look for the solid material in his house or store.

Student answer: You can tell by the way the crystals are shaped.

Student answer: He can probably look in a book or something to find out. All crystals are different.

Student answer: The crystals help him by making solid materials.

Student answer: Salt.

Student answer: To see if it was Epsom salt, salt, citric acid or calcium chloride.

Student answer: I going to put salt and water and leave it for some days and it is going to turn into crystals.

Student answer: If you put citric acid the crystals will be like a influx.

Student answer: I think it will help be by the shape and what has on it.

Student answer: How they look like x means salt.

Student answer: Since different materials have different crystals, like salt is a x, then you can figure out what material has the same characteristic shape as the crystal that were from that particular solution, then he knows what material was used.

Student answer: Because by the markings and patterns on the crystals your all to identify them.

Student answer: Because no 2 crystals are the same.

Student answer: Because a crystal identifies the solute!

Student answer: He could check the crystals with a magnifying glass.

Student answer: If he has a chart he can just match to whichever one it looks like.

Student answer: He can mate the crystals to the solid material.

Student answer: He would look up that type of crystal in a book and find out what type it is.

Student answer: He could match the crystals with other crystals.

Student answer: Show them the crystals.

Student answer: The crystals might have salt in them.

Student answer: He could compare the crystals to other crystals.

Student answer: Whatever the crystals look most like.

Student answer: He can compare them with other crystals he can make and that will tell him.

Student answer: The crystals can identify what solid was used in the solution by its shape.

Student answer: He will know because he will see stuff at the bottom.

Student answer: You can use your own mixtures and see what it looks like.

Student answer: Use all the salt then wait for them to evaporate but in the other trays name them by the salt so he would know which one is which but then there done he can see which one looks like that one.

Student answer: Because all solid has different crystals.

Student answer: Take other crystals and compare to see which ones are kind of the same.

Student answer: How the crystals were shaped and how they looked.

Student answer: He can look at them really hard and compare them with others.

Student answer: Adam can try to make crystals and if the solution he used makes crystals then that is the same solution his friend used.