3. Wave in a Bottle
STEM water activities can help students understand the movement of the ocean. This one couldn’t be easier…yet yields awesome results. You’ll just need a clear bottle or jar with a lid (a 2-liter soda bottle works well!), food coloring, cooking oil, and water, of course!
Fill approximately one-third of your bottle with water, then add several drops of food coloring and have students shake the bottle to disperse the food coloring. Then fill the rest of the bottle to the top with the oil.
As you swish the bottle back and forth, you’ll see waves forming!
(If you want to get creative, stick a cork or other floating object in the bottle and see what happens. Ask students what they can compare that to!)
You can talk to students about the formation of waves, features of waves, mixtures and solutions, and why the oil and water don’t mix.