Which conclusion can be made from the observation below? Hypothesis: A feather weighing two grams takes longer to fall from a distance of six meters than a two-gram ball bearing.

Procedure: Use a timing device to measure the amount of time it takes for a feather and a ball bearing to fall to the floor from a distance of six meters.

Observation: The feather took more time to fall to the floor than the ball bearing.

A. The feather fell slower because it weighs less.
B. The ball fell faster because it has more gravitational force.
C. The ball fell faster because it weighs more.
D. The feather fell slower because it encountered more air resistance.

If the drop is small enough, it is a perfect sphere.
 A sphere is the geometrical shape that has the smallest surface area for its volume. The drop takes this shape because water molecules tend to stick to each other. So, when not confined by a container, and with nothing around it to distort its shape, a very tiny water drop is perfectly round like a ball because the water molecules are pulling inward toward each other. 

If the drop is larger like a raindrop in free-fall, it has a domed top and a semi-flattened bottom because as it falls it must push the air out of its way. That "upward" push of the air being displaced causes the falling drop to have a rather flattened bottom. 

Contrary to popular misconception, a free-falling raindrop is not shaped like a teardrop -- round on the bottom and pointy on top.

From:https://www.quora.com/When-a-water-drop-falls-does-it-form-a-circular-shape