Experiment Theory - Class 9 PDF Download

What you need

• food colorings (rainbow colors are red, orange, yellow, green, blue, purple)
• water
• 6 cups (at least 4 inch tall)
• a clear straw
• sugar
• tablespoon
  
  Steps

1. Fill each of the six cups with the same amount of water.
2. Adding food colorings into the cups, one color in each cup.
3. Line up the cups from left to right.

4. In the first cup, do not add any sugar. In the second cup, add one tablespoon of sugar.
   In the third cup, add two tablespoons of sugar.
   In the fourth cup, add three tablepoons of sugar, and so on.
5. Stir until all the sugar is dissolved.
6. To make a sugar rainbow, grab the straw and place the end into the first cup, the one with no sugar.
   Only insert about half an inch into it.
   Cap the other end of the straw with your thumb before lifting it out of the water to prevent the water from falling out of the straw.

7. Now dip the straw into the second cup (1 tablespoon sugar).
   This time, insert it deeper so that the end is one inch below the water level.

8. In one quick move, release the thumb and recap again.
   Now you should have two layers of color.
9. Keep dipping the straw into each solution from the one with the least sugar to the one with five tablespoons of sugar.
   Each time, the straw is inserted half an inch deeper.