Which evidence originally supported Hess’s idea of seafloor spreading in 1968?
A) Younger rocks are closer to mid-ocean ridges.
B) The destruction of crust occurs at deep-sea trenches.
C) Oceanic rocks are pillow-shaped when formed.
D) Rocks across the ocean floor have alternating magnetic stripes.

Diego conducted an experiment to find out what kind of ball bounces the highest when dropped from a five-foot platform. he used a golf ball, a tennis ball, and a soccer ball. he dropped each ball from the balcony once. diego recorded his observations after each drop. what can diego do to best improve the reliability of his results? a) drop each ball from the platform three more times b) record his observations in more than one unit c) write at least two scientific questions after the experiment is complete d) share his results with other people who have done similar experiments you for the !