Complete Master List for #20 Magnetism:
Key: (1st/2nd/3rd) denote needed quantities: (1st) enough for 1 student doing all activities; (2nd) enough for 30 students working in 10 lab groups all self-paced; (3rd) enough for 30 students working in 10 lab groups, all doing the same lesson. Starred* items may be purchased below.
- * 2/20/20: rectangular ceramic magnet
- * 1/2/2: rolls masking tape
- 1/10/10: scissors
- * 1/2/2: boxes paper clips
- * 1/1/1: spool thread
- * 2/20/20: wooden spring-type clothespins
- * 3/20/30: baby food jars (or small beakers)
- 1/6/10: meter sticks
- 5/50/50: blank index cards
- * 10/10/10: steel straight pins
- * 1/1/1: roll aluminum foil
- 1/6/10: marking pens, black or other dark color
- * 10/100/100: meters thin insulated wrapping wire, 30-32 gauge
- * 1/10/10: meters copper or aluminum wire, 20-24 gauge
- * 1/1/1: 8 cm pieces of very thin, bare, copper or aluminum wire, 32 gauge or less
- 1/4/10: medium-sized empty cans
- 1/4/10: wire cutters
- * 1/4/10: candles and matches (or alcohol lamps or Bunsen burners)
- * 2/20/20: straight drinking straws
- 2/20/20: textbooks of equal thickness
- 1/2/5: exterior windows for tracing onto paper (or light tables)
- * 1/4/10: rectangular pocket mirrors (optional)
- * 1/1/1: roll clear tape
- 1/4/10: hole punch
- * 0.1/1/1: cup modeling clay
- * 1/10/10: size-D dry cells with magnetic outside casings
- 1/10/10: large paper grocery bag (or heavy wrapping paper)
- * 5/50/50: rubber bands, medium width or wider
- * 2/10/20: large nails, 3 1/2 inches long
- * 50/500/500: washers to fit onto large nails, with holes smaller than the nail head
- * 1/10/10: feet wood dowel, 3/16 inches in diameter
- 2/20/20: thumbtacks
- * 1/3/10: gram balances, those improvised in #05 Weighing are suitable
regular strength, 20 square feet x 12 inches rolls
Buy aluminum foil here as a convenience item, or for less in many grocery stores.
Baby Food Jars - assorted
Each set includes 4 small, 4 medium and 4 large glass jars.
These are basic workhorse brands, available everywhere.
Candles - emergency
cylindrical, 5 inches by about 3/4 inches diameter
Also called utility candles. A handy heating source. Correctly sized for #09 Floating and Sinking. Drip catchers not included.
Clay - modeling
Sold by the 100 gram stick, about 1/4 cup, in assorted colors (our choice). One stick serves a whole classroom for TOPS applications.
These are handy lab items to keep in stock. We use them as bulb holders, tongs, clips, and more.
Dowel - thin
wood, 3/16 inch diameter by 6 inch length
This diameter fits the hole in our ceramic refrigerator magnets. Needed for #20 Magnetism.
Gram Pocket Scale
digital, pocket size
Digitally weighs up to 500 grams, plus tare container. Sensitive to 0.1 gram in multiple weight units. Durable, but not childproof. Comes with two AAA batteries to get you started.
Magnet - ceramic
rectangle, 3/16 inch thick
Your basic refrigerator magnet, about the width and length of a large postage stamp, with N and S poles on each face and a hole in the middle. A useful and popular science supply used in may TOPS titles. Purchase at least 2 per student.
4x6 inch clear, reflecting plastic
A handy scientific tool. It is made of shatter-proof plastic with peel-off protective film. The plane surface may be flexed for funny faces and interesting experiments. Needed in #17 Light, #42 Focus Pocus.
Nails - 3 1/2 inch
steel carpenter's flat-head nail, 16-penny
A specialty item supporting #42 Focus Pocus and #20 Magnetism.
size #1, steel, box of 100
Paper clips have 1001 uses in TOPS experiments, and science in general. Feel free to use paper clips you already have, but be aware that different brands come in different sizes and weights. In experiments where uniformity is important, don't mix brands.
Rubber Bands - assorted
10 grams each of thin, medium and thick
You get 30 grams of soft, strong, durable rubber bands: thin #16 (about 50), medium #32 (about 20), and heavy-duty #64 (about 10). These sizes are specifically selected to work in most TOPS experiments.
steel, one and 1/16 inch long
Used in many TOPS experiments. Sometimes required for their magnetic properties. Don't purchase aluminum straight pins by mistake.
Straws - straight
Any length straw, between 0.20 and 0.25 inches in diameter is suitable. Grocery stores generally carry straws with flexible "elbows." You can use those if you cut off the bendable section before using.
Tape - clear
3/4 inch x 1000 inch roll
Your standard desk tape with matte write-on surface.
Tape - masking
3/4 inch x 55 yd roll
A handy science supply used in most TOPS modules.
light duty, 25 yd spool
Just plain old thread. Used in many TOPS titles, especially in Pendulums #34.
Wire - 24 gauge copper
This science lab staple is used in #19 Electricity, #20 Magnetism and #33 Magnetism.
Wire - wrapping
100 feet, plastic insulated
Also called magnet wire or bell wire. This science-lab staple is used in #19 Electricity, #20 Magnetism, #33 Magnetism, and #91 Global TOPS.
Wrapping wire may be recycled from old motors or transformers. If insulated with paint rather than plastic tubing, end leads will need to be sandpapered clean, not stripped with pliers.
Wire - very thin copper
The thinner the better. Old household appliance cords may be braided into suitably thin strands. Nip the insulation with wire stripping pliers, then pull off the insulation to inspect. This is a speciality item for #20 Magnetism and #33 Magnetism.