Giant Vibrating Crystal
[M | t | ★★★]
Styrofoam spheres linked by springs in a 3×3×3 cubic lattice.
[In-Depth Description]
Atomic and Molecular Crystal Models
[M | t |—]
Wooden, plastic, and Styrofoam models for show-n-tell.
Buckyball
[M | t | —]
Truncate an icosahedron to produce a Buckminister Fullerene...this is accompanied by a soccer ball and a C60 model.
OHP Kinetic Theory Model
[M | t+ | ★★★]
Simulation of molecular motion (Brownian, diffusion, etc.) with ball bearings on shaking table.
[In-Depth Description]
Crystal Growth & Recession
[S | t++ | ★★]
Observation of ice crystal growth under microscope; growth/recession controlled by dry ice boundary.
[In-Depth Description]
Crystal Growth in Castings
[S | t++ | —]
A hot casting is cooled rapidly to show the progression of crystal growth.
Dilatancy of Deformation
[S | t++ | ★★]
Balloon filled with sand and ink; any compression results in increase in volume due to deformation of close packing.
[In-Depth Description]
Cleaving of Sodium Chloride
[S | t | —]
Cleave down crystal boundaries of rock salt.
Periodic Potential
[M | t | ★★]
Balls in a frame simulating the repeating potential wells of a lattice.
Laue Optical Analog
[L | t | —]
2-Dim interfernce pattern as optical analog of x-ray diffraction; spinning the grating simulates polycrystaline ring patterns.
Liquid Crystal Sheets
[S | t | ★★★]
Liquid crystal sheets, OHP display, and calculator or watch, among others, are available for show-n-tell.
[In-Depth Description]
Molecular Size
[M | t++ | —]
Molecular size is determined by means of a Langmuir trough.
Glass Transition
[M | t+ | —]
Caramelized sugar assumes glasslike characteristics when rapidly cooled.
Supersaturation and Crystallization
[S | t++ | ★★]
Supersaturated solution of sodium acetate in beaker; crystallization triggered by seeding.
[In-Depth Description]
Change of Volume with State
[M | t+ | ★★]
CO2 and He balloons in liquid nitrogen.
[In-Depth Description]
BCC to FCC
[M | t+ | ★★★]
The microcystaline structure of a steel wire changes from body-centered-cubic to face-centered-cubic as it is heated to red-hot.
[In-Depth Description]
Sublimation of CO2
[M | t | —]
Solid dry ice turns directly into gaseous state.
Solid, Liquid, Gaseous CO2
[S | t+ | —]
Observation of phase changes with corresponding pressure changes.
PVT Surfaces
[M | t | —]
Three-dimensional plaster model of PVT relationships.
[In-Depth Description]
Contact Us
Mailing Address: Lecture Demonstration Services, Science Center, Rm B-08A, 1 Oxford Street, Cambridge, MA 02138
Campus Location: Science Center B-08A | Tel: (617) 495-5824 | Email: scidemos-at-fas.harvard.edu