Test products for impurities. example: compare the amount of lead in kinds of water, bottled, different, tap water, well water, etc.
And see if the label is correct. Like if the label says it doesn't have a heavy metal, is the label accurate?
I am seeing what metal rusts easiest
and in what levels of salt do they rust more
Can you use fruits or vegetables to charge your iPhone, etc.
What is the best alternative to fire starter?
Bioactive tanks and which animals,plants, and insects will make a tank bioactive
Which laundry detergent out of three different ones will get rid of a stain.
I’m doing a cloud chamber
What duct tape has the highest longitudinal strength, transverse strength, and which has the best adhesive strength.
Does the amount of moisture in foods affect how quickly that food will mold?
Conducting an experiment to support the curvature of the earth.
sorry i meant to put which stain remover is most effective.
Growing plants from a 5 gallon fish tank
What laundry detergent (or home remedy) is best for clearing 100% cotton cloth of assorted stain?
Sorry, I messed that up. I meant what solution (excluding name-brand detergents) is best for clearing 100% cotton cloth of assorted stain.
Comparing the sweetness of sugar and artificial sweeteners.
Science Fair Information