2-Liquids+Experiment

=WHAT IS A LIQUID? = [|©]

**Essential Questions: **
 * What makes a liquid different from solids & gases?
 * Why does water gather in drops?

**Learning Goals: **
 * Students investigate properties of liquids, specifically how liquids can dissolve solids, take the shape of its container, and holds together because of surface tension.

**Experiment Prerequisites: **
 * Students should know the properties of solids and liquids.

**Materials:**
 * 2 quart pitcher
 * Powdered lemonade
 * Spoon for mixing
 * Small cups for taste testing :)
 * Pennies (1 for each pair of students in your class)
 * Eye droppers (1 for each pair or group of students)
 * Small cup or dish of water for each pair of partners
 * Paper towels
 * Response Sheet (Download below)

**Experiment: (Students should work in partners) **
 * 1) Students will share the properties of liquids (specifically water)
 * 2) Students will demonstrate the dissolving qualities of water while making lemonade. Teachers will make a pitcher of lemonade to share in their own classrooms (this can be done ahead of time and poured into cups for students if you wish)
 * 3) Students will demonstrate the cohesive property of water by experimenting to see how many drops of water can fit on a penny.
 * 4) Have students make predictions about how many drops of water can fit on the head of a penny.
 * 5) Demonstrate procedure for penny experiment.
 * 6) Students will test to see how many drops of water they can fit on a penny.
 * 7) Share top 3 results from each group.
 * 8) Students will explain "why this works."
 * 9) Conclusions about properties of liquids.

[|Penny Experiment Website] **Vocabulary ** **<span style="color: rgb(255, 55, 0);">: ** [|©]<span style="font-size: 14pt; color: rgb(255, 81, 0); font-family: 'Comic Sans MS',cursive;">
 * **Concentration**–The relative amount of a substance in a mixture. ||
 * **Crystal–**The solid form of a material that can be identified by its natural shape or pattern. ||
 * **Dissolve–**The process of a material becoming mixed into another evenly. ||
 * **Dillute–**To make a solution less concentrated, usually by adding more liquid. ||
 * **Solution–**A special mixture formed when one or more materials dissolves in another. ||
 * **Solute–**A substance that dissolves in a liquid to form a solution. ||
 * **Solvent–**A substance (in this case, water) that dissolves a another substance to form a solution. ||
 * **Surface Tension**–is an attractive property of the //surface// of a liquid. It is what causes one drop of liquid to be attracted to another and hold together or "bubble up" ||
 * **Volume–**The three-dimensional space occupied by liquid. ||

<span style="color: rgb(255, 55, 0);">**<span style="color: rgb(255, 0, 0);">Resources: ** [|Response Sheet for Penny Experiment] Science Stories: Listen to the [|story on "Sour Power"] (Investigation 2) Source: []