Physics 433/533 - Physics Demonstrations
(1 - 3 credits)
Instructor - William S. Bickel
Physics Department University of Arizona
Office: PAS 273
E-mail: bickel@physics.arizona.edu
(520)621-2524/2534
Physics 433/533 is a physics
course designed to teach teachers how to teach physics, give
physics demonstrations, set up physics laboratories, teach
physics experiments and construct scientific devices.
Some of the classes are taught in classrooms
but mostly they are taught in the "Toy Shop" - the physics department's
lecture preparation room (Room PAS), in the 445/545 A,B,C,D,E,F teaching
laboratories (Room 145 and 245 PAS), in the Van de Graaff Laboratory
and in the Physics Staff Machine Shop.
The course covers 7 areas.
1. Teaching Materials - items for demonstrations and laboratories
2. Skills - experimental, technical, research, writing
and teaching
3. Presentation Techniques - view graphs, slides, black/white
board, hands-on
4. What to Teach - prerequisites, setting standards,
fundamentals, basics, making it relevant
5. Pedagogy - how to teach
6. Outreach - science fairs, projects, displays
7. Politics - Culture, Administration, Ethics, Standards,
Leadership, Chain of Command
1. Teaching Materials
Teachers will be made aware of the vast and inexpensive
resources available from surplus stores, supply houses, catalogs, hardware
stores, flea markets, salvage and outlet stores. What capital equipment
must a physics/science course have available? Where and how do we
get it? They will learn how to substitute inexpensive simple items for
expensive complicated items. They will develop, build or collect material
for "science kits" that can be used in the classroom for demonstrations
and labs or taken home by the student. They will develop projects, experiments,
simple measurements and demonstrations that can be done with their
kit. Kits will be inexpensive and made up of simple items. Teachers
will learn how to collect items useful for the teaching of not only
physics but also related subjects in mathematics, astronomy, atmospheric
physics, geosciences, biology, biophysics, chemistry and others. Teachers
will keep the basic items they collect in a suitcase. When the course
is over they can keep the suitcase and all the items in it.
They will learn what items are needed and necessary
to teach, demonstrate and study a particular topic in science. They
will design the experiments and demonstrations to be effective - to do
exactly what they are supposed to do - with no apologies. These items for
the kit and for teachers will be inexpensive, accessible, effective
and working. Teachers will participate in a "Salvage - Cannibalism Day"
where surplus equipment at the UA or elsewhere will be dismantled for
parts that the teachers can keep. They will learn how to design, build
and demonstrate demos that can be put on display (in the lab or lobby),
to be seen by all students (no video magnification) in the class. Teachers
will learn of the costs, dangers, convenience and problems with demonstrations,
demonstration kits and displays. Some items that will be collected are
listed at the end of this paper.
2. Skills
They will introduced to the importance of simple
hand tools, hand held power tools and machine shop tools and become
skilled in their uses. Everyone will learn how to use a lathe, mill,
drill press, band saw and grinder. They will also learn how to solder
wires, tap threads, use fasteners, glues, lubricants, clamps, solvents,
use telescopes, photography, microscopy, spectroscopy, glass blowing.
They will use computers as an aid to teaching but not as a substitute
for real experiment and demonstrations.
They will learn to use basic electronic equipment
- meters, oscilloscopes, power supplies, signal generators and data
acquisition devices.
They might learn a few magic tricks to demonstrate the differences
between science, pseudo science, magic and fraud. They will learn to
play a scale and a simple song on a musical instrument. Students will
make holders, stands, racks, mounts for all of the above items to put
into their kit
3. Presentation Techniques
They will learn how to introduce a demonstration,
display and experiment and how to expand a simple experiment into the
advanced and profound. They will learn to tailor the presentation to
the proper audience. They will learn how to use view graphs, overheads,
35 mm slides, videos, photographs, movies, charts, posters, black/white
board and direct demonstrations effectively. They will use color pens,
chalk, overlays and how to develop commentary and discourse to discuss
the material being demonstrated. They will learn how to use the element
of suspense, surprise and humor. They will see the importance of practice,
rehearsals and trial runs in preparing presentations and the importance
of knowing your audience. They will learn how to be aware of the classroom
and its lighting, acoustics and arrangement so all can see and hear.
They will learn how to use reports, manuals, handouts, diagrams, items
and figures and to decide who gets them and when.
They will develop spontaneity and not a "cook
book" mentality in delivery. They will learn to deal with emergencies
when things don't work or break. The show must go on so to keep control
of the presentation they must learn poise, confidence, professionalism
and sophistication. There will be a lecture by a drama coach. Each student/teacher
will develop two favorite 1/2 hour demonstrations, seminars or presentations
with all materials at hand. They most know their equipment, their material
and their presentation.
4. Pedagogy
What do the students know? What are the basic
starting points? Careful planning of the presentation regarding prerequisites,
present knowledge and goals. The importance of proposals, progress reports
and final reports - lab reports, publications. When are we FINISHED?
Stay away from computers, videos, HI TECH, toys, permanent setups,
modules with no opportunity to experiment, explore, make mistakes,
fail, correct mistakes, modify and succeed. We will rely on other related
areas: geology, geosciences, atmospheric sciences, astronomy, chemistry,
biophysics and others and integrate their basic ideas and experiments
into physics teaching.
Experimental strategy - what to do first, where
to start, quick and dirty but works - then well planned and careful
until the data are "good enough". When are the data good enough? How
to grade students on projects, labs and presentations. How to convince
students that what they are about to learn is important. Related courses:
Independent Studies, Physics 445/545 ABCDEF, proctoring and mentoring
for experience.
The psychology of teaching - attention span, interest, value,
work ethic, how does it fit and relate? The use of history, culture,
politics, famous scientists, names and dates of important scientific
events, the ethics, economy and business of science. The importance
of timing, practice, repetition, accuracy and reproducibility to make
a convincing point.
"The Library" - the Collection of Books - magic
tricks, biographies, journals, manuals, puzzles, classic old historic
information. Reading assignments - famous scientists and people, historic
events and achievements. We will examine experimental and demonstration
text books of the past - Faraday, Tesla, Edison, The Boy Scientist etc.
We will try to promote science from teacher to student to parent and
others - through interesting reports, newsletters, papers, programs,
TV, books, shows, museums, field trips, display cases, contests, fairs and
open house. We will try to teach how to use the world around us for our
supplies and not rely on expensive, one-of-a-kind fancy teaching equipment.
5. What to Teach
The symmetry of the development of demonstrations
- simple to complex. Establish the basic principles to be learned in
each area of study. Demonstrate how these ideas are common and important
to all other areas - look at connections and interdisciplinary topics.
The importance of basic fundamental starting points. Keep it simple,
deliberate, slow and effective. Students will give demos in class,
do experiments and teach how to do experiments.
Cover statistics, probability, error, uncertainty,
accuracy, precision, chance, averages, most probable value, the right
value, the best value - the right answer. Develop experimental design
to get good results. Nothing works all the time. When are the results
and data good enough???
Basic math: conic sections, graphs, curves, waves,
shapes, diagrams. Practice drawing basic forms and structures in
2-D, 3-D and perspective.
Use linear, log, log-log, polar, Smith and
Gaussian plots as analog computers. Be able to print, draw and sketch
- by hand - accurately enough to make a point.
6. Outreach, Parents, Fairs
Use competition among students, groups, classes
to get the fastest, highest, brightest, longest, quickest result. Perform
demonstrations in front of classmates - the entire school - to
show science and experimentation in action and show that it is exciting
to do science. Prepare for Science Fairs, Parents Day, Science Day
and other opportunities to show off the science program, its success and
its products. Use field trips, associations with other schools, colleges
and universities, industries and companies. Involve parents, brothers,
sisters and others in the neighborhood. Give press releases to TV, radio
and newspapers. Develop long-range many-student projects that take weeks,
months or a year to complete. Involve students from other courses -
math, chemistry, biology, writing, art, etc. to participate.
7. Politics, Culture, Administration, Ethics, Standards, Leadership,
Chain of Command
Learn about scientific funding and other support
for teaching, research and learning. Responsibility in the classroom
- to students, parents, society and the administration. Who's in
charge? Who is paying the bills? The setting of standards. Testing
and reporting results. Safety in the lab. Use of harmful items. Student
experimenting on their own - at home. Coordinate activities with other
departments and teachers.
Some other considerations:
1. Discuss why everyone should know science. Come to an agreement
on what basic science everyone should know - in all disciplines.
Ask professors and teachers to indicate what the most important
concepts are to know - now and forever. Have them generate a paper,
report, tutorial and a problem set to see if students understand.
The job is not to just teach science - i.e. just go through the motions -
but to be a scientist as you teach!!! Establish credibility in the classroom
and school.
2. What demonstrations can be set up permanently - on the wall,
in the lobby, in a class room for all students and others to see and
use and learn from. Get things into display cases.
3. Read newspapers and magazines and collect outrageous articles
showing how science is abused. Discuss bad science, pseudo science,
ineffective science, fraud. Know the difference between theory, fact,
opinion, belief, faith, assumption, law, tradition, custom, science,
religion
4. Students will make specific scientific items in the machine
shop: Tesla coil, tuning fork, interferometer, set of springs, Newton's
fringes, bicycle wheel for angular momentum etc.
The following are some items for kits, demonstrations, experiments,
discussions, displays:
magnets, springs, rubber tubing, weights, string, tape, colored liquids, stop watches, rulers protractors, calipers, compass, calculators, resistors, light bulbs, diodes, batteries and holders, solutions, beakers, scales, tuning forks, meters: SLM, VOM, frequency, digital and analog, current/voltage/frequency supply, resistors, capacitors, coils, standards, switches, pots, breadboards, metal tubes, rods, plates, wire, laser pointer, slits, apertures, razor blades, pins, foil, colored paper, glass tubing, small motor with gears, optical elements: lenses, gratings, prisms, polarizers, mirrors, filters, Fresnel lenses, thick glass, microscope slides, glass capillaries, optical fibers, colored glass, light sources - point, line, area and volume sources, diodes (LEDS's), optical detectors, spectrum lamps, cheap camera, binoculars, soldering gun and solder
Students will be encouraged to collect these items from wherever they can and keep them in a suitcase for their personal use.
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