Which process will create new sand in a desert

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.

How does human environment effect the biosphere

Pentane with molecular formula c5h12, exists in three isomeric forms. one shows linear carbon chains, another has one -ch3 groups present on the third carbon atom, and the third has two -ch3 groups present on the second carbon atom. what types of isomers are these? a. geometric isomers b. structural isomers c. halotropic isomers