2. Example: Using a hand lens to examine the color and texture of four different rocks

3. Example: Measuring the width of a desk with a meter stick

4. Example: Planting rye grass seeds in potting soil in three plastic cups, placing them on a window sill, and watering one daily, one every third day, and one not at all

5. Question: How does the amount of potato affect its reaction with a fixed amount of hydrogen peroxide?

6. Question: Which vegetable shows the greatest reaction with hydrogen peroxide?

7. Question: What happens when a piece of potato is added to hydrogen peroxide?