The Structure of SolidsThe Structure of SolidsRead about Particles in a Solid, page 92 in Read about Particles in a Solid, page 92 in

Focus on Physical Science.Focus on Physical Science.Take notes on the following terms:Take notes on the following terms:

Solids: particle arrangement and movementSolids: particle arrangement and movement Crystalline solidsCrystalline solids Amorphous solidsAmorphous solids Examples of crystalline and amorphous solidsExamples of crystalline and amorphous solids

Watch the demonstration with Watch the demonstration with chocolate and the Jolly Rancher. chocolate and the Jolly Rancher. Write your observations Write your observations (in your IAN:(in your IAN:

Pg. 12

Relevant Changes of Relevant Changes of StateState

During this lab, we will take the salol During this lab, we will take the salol through two changes of state:through two changes of state:

Melt:

Freeze:

From solid to liquid; gain energy

From liquid to solid; lose energy

Lab Process StepsLab Process Steps1.1. Your teacher will come melt the Your teacher will come melt the

salol by holding a flame under the salol by holding a flame under the slide.slide.

2.2. Hold a piece of ice on the bottom of Hold a piece of ice on the bottom of the slide, then wipe the bottom off.the slide, then wipe the bottom off.

3.3. Observe the salol re-crystalize Observe the salol re-crystalize using the stereoscope. using the stereoscope.

4.4. Draw the crystalsDraw the crystals..(On pg. 11 of IAN)(On pg. 11 of IAN)

Process QuestionsProcess Questions1. When the salol froze back into a 1. When the salol froze back into a

crystalline solid, what did you see?crystalline solid, what did you see?2. Why is the salol a crystalline solid?2. Why is the salol a crystalline solid?3. Which has a specific melting point, 3. Which has a specific melting point,

a crystalline or an amorphous a crystalline or an amorphous solid?solid?

4. What do amorphous solids do 4. What do amorphous solids do when they melt?when they melt?

Also on pg. 11 of IAN