First, gather your supplies. I went ahead and added the food coloring to the alcohol and water for this picture.
For the optional trench layer, mix corn syrup with black or purple food coloring. Pour the mixture into the bottom of your see-through container.
For the abyss layer, pour a sizable layer of dish soap into your see-through container.
For the midnight layer, mix water with dark blue food coloring. VERY CAREFULLY pour the mixture on to the dish soap layer.
For the twilight layer, carefully pour cooking oil on to the water layer.
For the sunlight layer, mix alcohol with light blue food coloring. Carefully pour the mixture on to the oil layer.
You now have a model of the ocean zones.
Note on this project: When we made our first model, the alcohol did not sit on top of the cooking oil like it was supposed to. We thought it was because we didn't use enough cooking oil. When we tried again, it did a little bit better, but the colors of the alcohol and water were too close. While we could see the layers at first, it became a big mess by the end.
So we did it again! This time, we decided to go ahead and put the oil on top and the alcohol below it. When we poured the alcohol into the water, we could see a distinct layer. When we added the oil, it sat on top. Although we tried three different times, we couldn't get it to work exactly right. We added glitter to the third try. It was a lot of fun to watch the glitter blobs rise and fall.
Lesson learned: sometimes experiments don't work out exactly like you want them to, but if you try again, you might be able to achieve your desired result. Sometimes, it still doesn't work. When that happens, you can decide to be upset about it or you can think about the fun time you had. We decided to revel in our fun.