What process caused the accumulation of sand that produce the sand dunes? A. deposition

B. physical weathering

C.

chemical weathering

D.

erosion

Which type of fossil does this image depict?

  the mississippians were considered to be  horticulturalists, which means they were

What does a complete balanced chemical equation include? a. exothermic coefficients b. endothermic coefficients c. valence electrons d. molar coefficients