Question: What supplies are needed to make a rainbow in a bottle?

  Options: 
 A. A small, opaque bottle Food Coloring Water Salt 5 small beakers (or drinking cups) Spoon or stirrer Scale or electronic balance (or 1/2 teaspoon) Pipette or medicine dropper
 B. A small, clear bottle Food Coloring Water Salt 5 small beakers (or drinking cups) Spoon or stirrer Scale or electronic balance (or 1/2 teaspoon) Pipette or medicine dropper
Answer: B