You can even add glitter, food dye, or lamp oil to the bottle to make the tornado even cooler. Rainbow in a glass via GIPHY This experiment takes advantage of density to create a rainbow in a glass.

Put on a colourful musical performance with these rainbow bottle shakers! A super simple music-inspired craft activity from The Let's Go Club. Use the funnel to pour the rice into the bottle Put ...

The accurate determination of the weight is (with marine animals) achieved by weighing a density bottle full of sea water and estimating the halide in the contents of the bottle gravimetrically ...