It's easy to fix dried out markers, like Sharpie pens. Learn a simple life hack based on chemistry and which markers you can fix.
Monthly Archives: May 2020
Like many household chemicals, hydrogen peroxide (H2O2) has a shelf life. Over time, peroxide breaks down into water and oxygen. The shelf life of a bottle of unopened household peroxide is about 3 years, while it’s only good for 1 to 6 months after the seal is broken. Household peroxide […]
Hydrogen Peroxide Shelf Life Before and After Opening
Rainbow roses are real living roses that have been dyed so their petals are multicolored. Before coloring, the natural rose is white. Rainbow roses you buy are made by injecting proprietary dyes into the stems of the flowers. However, you can make homemade rainbow roses. Here are two methods for […]
How to Make Rainbow Roses (Including Black Rainbow Roses)
Here are four ways to separate sand and salt. This science project teaches about purification using solubility, density, and more.
How to Separate Sand and Salt
Polar and nonpolar molecules are the two broad classes of molecules. Polarity describes the distribution of electrical charge around a molecule. Charge is evenly distributed in a nonpolar molecule, but unevenly distributed in a polar molecule. In other words, a polar molecule has regions of partial charge. Here are examples […]
Polar and Nonpolar Molecules
The independent and dependent variables are key to any scientific experiment, but how do you tell them apart? Here are the definitions of independent and dependent variables, examples of each type, and tips for telling them apart and graphing them. Independent Variable The independent variable is the factor the researcher […]
Independent and Dependent Variables Examples
Bottled water usually has an expiration date stamped on the container, but does it actually go bad? How long is bottled water good? The simple answer is that water is a pure compound that never goes “bad.” It is labelled with an expiration date to comply with state laws and […]
Why Bottled Water Has an Expiration Date – Does It ...
Here's everything you need to know about piranha solution, including how to make it, how to use it safely, and how it works.
Piranha Solution – How to Make and Use It Safely
Here are two easy ways to make homemade waterproof magic sand. This is sand that doesn't get wet in water, making cool shapes instead.