What effect does soap in water have on plants? Is the effect the same at very low soap concentrations as compared with high concentrations?.Are the two values the same? If not, is there a relationship between them? How does the pH of soil relate to the pH of the water around the soil? You can make your own pH paper, test the pH of the soil, add water, then test the pH of the water.What steps can you take to maximize crystal size? You can affect vibration, humidity, temperature, rate of evaporation, purity of your growth medium, and time allowed for crystal growth.What effect do additives have on the crystals? You could add food coloring, flavorings, or other 'impurities'.Do all hairsprays hold equally well? Equally long? Does type of hair affect the results?.Is laundry detergent as effective if you use less than the recommended amount? More?.How permanent are permanent markers? What solvents (e.g., water, alcohol, vinegar, detergent solution) will remove the ink? Do different brands/types of markers produce the same results?.Do all dishwashing detergents produce the same amount of bubbles? Clean the same number of dishes?.If you shake up different kinds or brands of soft drinks (e.g., carbonated), will they all spew the same amount?.Can a saturated solution of sodium chloride still dissolve Epsom salts?.What plastic wrap prevents oxidation the best?.
What type of plastic wrap prevents evaporation the best?.What ratio of vinegar to baking soda produces the best chemical volcano eruption?.Does air temperature affect how long soap bubbles last? Does relative humidity?.
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