Astudent visits the beach and wants to explore how landforms, such as sand dunes, are the result of changes caused by wind. what is the best tool to use while observing these changes? a graduated cylinder b hand lens c camera d microscope

C Camera. I think this because you can make timelapses with cameras which makes it easy to see.

Camera because it would be helpful to photograph the dunes at different times and compare the differences resulting from wind.

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.