Sand dunes form as wind
a. Disperses sand.
b. Blows sand from the back to the front of the dune.
c. Blows sand from the front to the back of the dune.
d. Interrupts the normal sequences of deposition.

Which environment would most likely not contain fossils? a a thick deposit of cracked, dried mud b sediment deposited in a sandy river bed c intrusive rock formed from cooled magma d layers of sand accumulated for a century

Choose the item that is an example of the geographic theme of place.

Countries trade with each other because resources are not evenly distributed across the globe. true or false