Try This at Home: Sight or Scent The prefix "nano" means one
billionth. At such a small scale, some tools are more reliable
and useful than others. What You Need - 100 mL (~1/2 cup) water
- Graduated cylinder or measuring spoons - 1 mL (1/4 teaspoon)
colored mouthwash (or colored water with a drop of vanilla or
perfume added) - 10 identical small cups or an ice cube tray
What To Do Make sure you have an adult with you to supervise
this experiment. Line up the nine cups in a row and label them 0
through 9. Fill Cup 0 with 10 mL (2 teaspoons) water. Fill Cup 1
with 9 mL (1 3/4 teaspoons) water and 1 mL (1/4 teaspoon)
mouthwash. Stir. Fill Cup 2 with 9 mL (1 3/4 teaspoons) water
and 1 mL (1/4 teaspoon) solution from Cup 1. Stir. Fill Cup 3
with 9 mL (1 3/4 teaspoons) water and 1 mL (1/4 teaspoon)
solution from Cup 2. Stir. Observe the color and scent of the
mixtures in Cups 1, 2, and 3. Are they the same? Make a
hypothesis! How do you think the mixture in Cup 9 will look and
smell? Fill the remaining cups in the