Rainbow Crystals Color Science Experiment
In this fun and easy color science experiment, we’re going to explore water storing crystals and use them to create an array of rainbow colors.
- Water storing crystals – You can easily find these online. These are great for experimentation and are used primarily to hold water in soil for plants.
- Measuring spoons
- Measuring cups
- Several different colors of food coloring
- Several paper cups
- Put one tablespoon of water storing crystals into five or six paper cups.
- Add one quarter cup of water to each cup.
- Put a drop of food coloring into each cup.
- Observe the water absorbing crystals for thirty minutes.
How it Works:
Water absorbing crystals are small chunks (or crystals) of man-made, water-absorbing polymers that are often added to soil to help provide moisture to plants. The water absorbing crystals are like little sponges and each crystal holds a lot of water compared to their size. Once saturated, the crystals can be many times larger than their original size. The water is then gradually released over time into the soil. When food coloring is added to the water, this makes the water absorbing crystals take on the color and allows you to create rainbow crystals.
Make This A Science Project:
Try mixing different colors of water absorbing crystals in a clear baggie and observe any changes in color. Experiment with leaving the crystals out to dry. Try adding salt to the crystals. Try adding a squirt of hand sanitizer to the crystals.