Question:

What is the effect of height from which a drop of water falls on the size of the drop print?

 

Equipment:

Procedure:

  1. Formulate and record a hypothesis to answer the question: What will happen to the size of a drop print as you raise the dropper?
  2. Add 2 drops of food coloring to the plastic cup, and fill it half full of water.
  3. Construct a data table including columns to record the height of the dropper and the width of the drop print. Go from a dropper height of 2 cm to 20 cm by increments of 2 cm.
  4. Partially fill the eye dropper with the colored water. Hold the metric ruler vertically on the index card.
  5. Place the tip of the dropper at the 2 cm mark. Slowly squeeze the bulb and allow one drop to drip onto the card.
  6. Immediately measure and record the width of the drop print.
  7. Repeat steps 4 and 5 for each height listed in the data table.
  8. Make a line graph of the results.

Questions:

  1. What was the drop print size when the dropper was held at the 12 cm mark?
  2. Why was the food coloring used?
  3. How does your hypothesis compare with the results of the activity?
  4. What variable was controlled?
  5. What is the effect of drop height on the size of the drop prints?
  6. Why did you have to measure the drop print size immediately?