Complete Master List for #13 Cohesion/Adhesion:
Key: (1st/2nd/3rd) denote needed quantities: (1st) enough for 1 student doing all activities; (2nd) enough for 30 students working in self-paced pairs; (3rd) enough for 30 students working in pairs on the same lesson. Starred* items may be purchased below.
- * 4/40/40: dropper bottles with droppers
- * 1/3/3: rolls masking tape
- * 1/1/1: bottle blue food coloring
- 1/1/1: bottle 70% rubbing alcohol
- 1/1/1: source tap water
- 1/1/1: bottle Joy, Dawn or other high-suds liquid detergent
- 1/1/1: bottle corn oil
- 1/1/1: roll waxed paper
- * 1/10/10: graduated cylinders, 10mL capacity
- 1/10/10: hand calculators
- 1/10/10: pennies
- 1/1/1: roll soft paper towels
- 1/10/10: scissors
- 1/5/10: large jars or equivalent supports
- 1/1/1: wall clock with second hand (or wristwatches)
- * 1/10/10: generic paper plates, 9 inch diameter
- 1/4/10: drinking glasses
- 1/4/10: shallow bowls
- 1/1/1: shaker of fine pepper
- * 5/50/50: aluminum straight pins (NOT steel)
- 1/1/1: bar of soap
- * 1/1/1: package solid camphor
- 2/20/20: medium styrofoam cups
- 1/10/10: toothpicks
- * 1/30/30: plastic drinking straws
- 1/10/10: pieces string, 10 inches long
- * 4/20/40: microscope slides
- 1/4/10: candles
- * 1/4/10: paper clips
- * 5/30/50: medium or large baby food jars
- * 4/20/40: thin rubber bands
- * 1/4/10: eyedroppers
- * 1/4/10: hand lenses
- 1/10/10: sheets newspaper
- 1/3/10: sets of 8 washable colored markers
- * 1/3/10: rolls clear tape
- 1/1/1: shaker of table salt
- 1/10/10: plastic tubs with lids
- 1/1/1: plastic gallon milk jug
- * 1/1/1: bottle glycerine
- 1/1/1: gallon distilled or deionized water (optional)
- * 1/1/1: spool thread
- 2/6/20: size-D batteries, dead or alive
- 1/10/10: pieces corrugated cardboard, 2x8 inches or larger
- 1/3/10: index cards, 4x6 inch
- * 1/1/1: roll aluminum foil
- 1/2/10: medium test tubes (optional)
- 1/2/10: meter sticks
- 1/1/1: bottle vinegar (optional)
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.
This is a specialty item for #13 Cohesion/Adhesion. Toss the tiniest specks of DRY camphor (the smaller the better), ONTO the surface skin of a glass of water. Watch them zip and spin around, fueled by the energy of breaking hydrogen bonds! If you allow water to adhere to the surface of these specks (get them wet), nothing happens.
Be aware that camphor irritates eyes, skin, mucous membranes, and is highly toxic if swallowed. Because it evaporates readily, keep tightly sealed, and use only where good air circulation is available. Maintain adult supervision during use.
Dropper Bottle with Eyedropper
1/2 ounce, amber glass
Very handy for storing and conveniently dispensing small quantities of liquid. You may also purchase eyedroppers without bottles as item #1120.
glass, with rubber bulbs and screw-on plastic bottle top
These have many lab uses. You may purchase them separately here, or with 1/2 ounce dropper bottles (as item #1121).
Separately, these also double as Cartesian Divers in #200 Diving into Pressure & Buoyancy. If you already have droppers, test them in advance to see if they make good 'divers': Remove plastic bottle top, if any. Dropper must float when empty, then sink with a one-squeeze-intake of water. Test that the seal between bulb and barrel is water tight: The empty dropper should float for a day or so in a glass of water, without taking on visible water.
Food Coloring - blue
liquid, dispensed in 1 fl. oz. squeeze bottle
A handy science supply used to make water more visible. Used in #39 Corn and Beans, #41 Planets and Stars, and several other TOPS modules.
liquid dispensed in 2 fl. oz. plastic bottle
Used in #13 Cohesion/Adhesion and optionally in #42 Focus Pocus. A great addition to soap solution for making strong, large bubbles.
Graduated Cylinder - 10 mL
shatter resistant plastic on stable base
An important lab inquiry tool for measuring small liquid volumes.
Magnifier - hand lens
3X clear plastic hand lens
You'll find many uses for this basic tool of scientific inquiry. Very nice quality for the price. Supports #17 Light, #23 Rocks and Minerals, and #42 Focus Pocus. (One 3X hand lens is also included in each #100 Triple Magnifier Kit.)
glass, standard size
Used in #17 Light for diffraction experiments. For viewing microscope specimens, consider cutting slides, almost for free, from clear plastic bakery cartons. Smooth any sharp edges with sandpaper or an emery board.
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.
9-inch diameter, generic white
A classic ripple edge-design, with wide application in TOPS experiments. Buy these here for convenience, or for less at your local grocery store.
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.
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 60 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.