PROBLEM: How many drops of water will fit onto the “Lincoln” side of a penny?

PREDICTION (Hypothesis): I predict that ____ drops of water will fit on the head side of a penny.

PREDICTION (Hypothesis): I predict that approximately 30 drops of water will fit on the head side of a penny.

PREDICTION: I predict that a certain number of drops of water will fit on the "Lincoln" side of a penny, but this number is unknown at this stage.