A geologist is studying a new soil profile. In analyzing the profile, she finds that the topsoil is rich in organic material. She concludes that this soil would be great for growing crops.
What materials combined to form the topsoil?
weathered bedrock and wind-blown sand
decomposed humus and wind-blown sand
decomposed plant litter and weathered parent material
deposited sediment and decomposed plant litter

Driving to work instead of using public transportation is like not
eating everything on your plate. It wastes valuable resources. You

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.