Most nails are made of iron or steel, which is mostly iron. Thus, iron nails can be purchased at virtually any hardware store. Just ensure that the nail you purchase is not galvanized (coated) and does have any other coatings. ...
The microscope that we offer has been especially chosen for our biology courses. It has 3 magnifications (40,100,400), a built-in light source, an iris to change the intensity of the light, separate coarse and fine focus knobs, and is DIN standard. The model is National Optical Model 131-CLED and is listed as an “advan...
Alum can be found in most supermarkets where the spices are sold. It is used to make pickles, for example. It can also be found in drugstores, where it is used as an astringent. You will need about 10 tablespoons for the experiment. ...
Typically, you get bad results with the sugar because you did not really make a saturated solution. You can pack a lot of sugar into hot water. You could also try to wet the thread and roll it in sugar so that there are small sugar crystals on the string. They will make “seed crystals,” which will encourage more crysta...
Click [here][1] to view an explanation of the experiment. [1]: https://www.energizer.com/science-center/how-to-make-a-flashlight ...
You can go to a pet store and ask to take samples of water from an aquarium. The variety of microorganisms you will see will be different, but you will see microorganisms. If you cannot obtain water from an aquarium, you might try a dog’s water bowl, as long as it has set out for a few days. There will also be microorg...
Once you know the mass in amu, you also know how many grams it takes to make a mole. Remember, the mass on the periodic chart tells you two things: 1) The mass in amu 2) The number of grams it takes to make a mole. When you figure out the mass from the periodic chart, you will find that it is 295.3. That tells you...
If you have trouble seeing organisms in this experiment, it is usually because of lack of patience or improper focus. * Make sure you stay at LOW POWER while you scan the slide. Scan it SLOWLY, looking for little dots that move. When you find them, ONLY THEN should you go to higher magnification. You will spend the...
When plasmolysis occurs, the water in the cell gets pulled out. You will see this as the cells getting lighter and lighter, as the organelles are pulling together in response to the cell losing water. Please do an internet search for some excellent pictures on plasmolysis. ...
When sliding down a slide, you pick up a certain amount of static electricity. When rubbing the balloon against your hair (as you did in the experiment), you pick up a different amount of static electricity. It turns out that the amount of electricity in the experiment is significantly less than what you pick up when g...