Ageologist finds ripples preserved in ancient sedimentary rock that look just like ripples made by water in mud. he concludes that there was once water in that location that created the ripples. why is this conclusion reasonable?

In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.

What do you think car designers do if the damage caused by a crash test is too severe?

Gas cloud 1 is likely to form a star. gas cloud 2 is not. based on this information, match the given conditions with each cloud