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Posts Tagged ‘chemistry’

Chemistry Experiment: Milk Fireworks!

Science is more than test tubes, microscopes and formulas. And children have a natural curiosity in STEAM subjects (science, technology, engineering, arts and mathematics).

Scientific thinking involves asking questions, learning from mistakes, trying again, exploring new activities and coming up with solutions. Children are natural scientific thinkers, and they want to learn and solve problems.

You can encourage your little scientist’s interests by conducting this easy and fun chemistry experiment at home.

Materials

  • Liquid dish soap
  • Whole milk
  • Cotton swabs
  • Red, yellow, blue and green food coloring
  • Shallow tray

Procedure

  • Pour enough milk in the tray to completely cover the bottom of the tray and allow the milk to settle. Add one drop each of the red, yellow, blue and green food coloring to the milk. Keep the drops close together, but not touching, in the center of the tray of milk.
    • What does this look like?
  • Before completing the next step, explain to the group what you will do next and have them make a prediction about what will happen. Then, touch the tip of a cotton swab to the milk in the center of the tray. Do not stir the mix, but gently touch it with the tip of the cotton swab.
    • What happened?
  • Have the group make a prediction about what will happen next. Place a drop of liquid dish soap on the tip of the cotton swab. Place the soapy end of the cotton swab in the middle of the tray and hold it there for 5 to 10 seconds.
    • What happened?
    • What do you see?
    • Why do you think that this happened?
  • Add another drop of soap to the tip to the cotton swab and try it again. Try placing the cotton swab at different places in the milk.
    • Did anything change?
    • What do you think will happen if we keep doing this?