What hypothesis states that the continents were once joined to form a single supercontinent

What group addressed the issue of slavery in the election of 1848 by opposing slavery in new territiories

How are farmers that use no plow farming methods able to improve air quality for the people around the fram

Sandstones that form in aeolian (wind/desert) environments appear very different from other sandstones, such as those formed in a beach/ shoreline environment and in rivers on land. give three identifying properties for each of the three sandstones that would tell a geologist which depositional environment they formed in. consider things such as the relationship between transportation and grain size, shape, roundness, sorting, fossils and composition.