Mini ExperimentSugar, Water, and Temperature

What is our big question?• Do solutes dissolve faster in different temperatures of solvent?

• A solvent is usually a liquid, like water or tea

• A solute is what you are mixing into the solvent, like sugar or salt.

• Example: When your parents mix sugar in their coffee, the coffee is the solvent and the sugar is the solute!

How should we measure this?• Using water and sugar!

• What materials should we use?• 2 clear glasses• Sugar!• A timer• Stirrers• Water

What are our variables?• Who can tell me what an independent variable is?• Do we have more than one?

• What is our dependent variable?

Hypothesis• What do we think we will see?

• If/ Then statement

Materials and Procedure• Your procedure and materials should be very clear.• Be sure to use measurements like ounces, tablespoons, and

minutes and seconds.

• You should be able to give them to any classmate and they could re-create your experiment exactly!

Set-Up and Observations• I have already warmed up one glass of water. I need two

students to volunteer to help me out with the stirring

• I need two more students to volunteer to time each glass of water and record the time in our “Observations” section on the board.

• Let’s go!

What did we see?• The sugar dissolved faster in the cup containing hot water. • It dissolved nearly two times as fast.• Our hypothesis was found to be true.

• WHY?

Matter and Temperature• Everything is made up of atoms and molecules.• They are constantly moving, even though it may not look like it• Think about it: Your chair and desk are made of atoms and

molecules, and are moving!

• When we heat something like water up, those molecules and atoms receive more energy, and can move around much faster.

• Because they move faster, they can crash into anything in their way– including sugar molecules!

Matter and Temperature• So, because the water molecules hit the sugar molecules more

often and harder, they break down the sugar more quickly!

• This is basically the information for your conclusion.

• A good addition to any conclusion is to say how you would change the experiment or make it better.

• For example, if I were to do the experiment again, I would use several different temperatures of water to see the exact relationship between temperature and sugar dissolving.