Simple Experiments; Colored Rain In The Water


Have you ever heard of a river flowing through the ocean? What happened to cause the two liquids to flow in opposite directions? Have you ever seen oil spills on water, aside than rivers and the sea? What happened to the oil and water at the moment, exactly? Let’s try this experiment to find out!

Tools and Materials of Colored Rain In The Water

  • 2 pcs clear glass
  • Water
  • Cooking oil (Cooking oil that hasn’t been used in a long time but is still clear can be used.)
  • 3 food coloring
  • Spoon for stirring

Instructions for Use of Colored Rain In The Water

  1. Prepare tools and materials on the table
Simple Experiments; Colored Rain In The Water 1
Step 1

2. 2. Put water in one of the clear glasses until 3/4 it’s full

Simple Experiments; Colored Rain In The Water 2
Step 2

3. Put the oil in another glass as much as ΒΌ cup

Simple Experiments; Colored Rain In The Water 3
Step 3

4. Add 3 drops of food coloring for each color in turn

Simple Experiments; Colored Rain In The Water 4
Step 4

5. Stir gently using a spoon

6. Put the oil that has been dropped with food coloring into a glass of water

Simple Experiments; Colored Rain In The Water 7
Step 6

7. Observe a few seconds

8. Food coloring will fall to the bottom of the glass like colorful rain

Explanation of Colored Rain In The Water

The molecular bonds in water and oil are not the same. Because these various molecules are unable to connect to one another, they are unable to mix and form two layers. The same phenomenon happens with colors that are made from a liquid (water) that is mixed with the oil. Despite being swirled, the color particles that are dropped into the water are not combined.

Because of their comparable qualities, the molecular bonds between the compounds contained in the color and water will attract each other when the oil containing the color is placed in water. The color in the oil gradually comes out of the oil and mixes with the water as a result of this. The clear water will gradually clear each drop of color until it is entirely blended.

Because fresh river water differs from salty sea water, there is a difference in water density in the phenomenon of rivers in the sea. So that river water does not combine with salt water in the sea.

Mixing oil and water can still be done, but it needs an additional substance called an emulsion as an intermediary. An example of an emulsifier is soap.

Safety Instructions

  1. To avoid risky workplace mishaps, use plastic cups. When glass cups are bumped and broken, they can harm body parts.
  2. Keep an eye out for spilt oil, which is slick and might cause you to slip if you tread on it.
  3. Dispose of any water or oil that has been spilled on the ground, don’t pour it down the sink because it could clog the drain.
  4. Ask for help from an older person.


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