Question

Help ASAP will give medal & become fan with 2 science question.

1. Every year, Eli and his family visit the Great Sand Dunes desert in Colorado. Eli notices that more sand dunes desert in Colorado. Eli notices that more sand dunes varied shapes and sizes appear each year. Explain what causes this phenomenon.

2. Hannah is comparing a rock from a riverbed and a rock from deep underground. One is very smooth, and the other has very rough edges. Explain why each rock was probably found in that location.

Answer 1

http://www.roadsideamerica.com/tip/10121 <- 1
well in riverbeds rocks are constantly being moved from the flow of water, the constant rolling around smooths the rock. where as ones found in the ground buried would be rough sharp edges because they arent moved around, and most likely were part of another rock and it broke off as the earths land masses move.

Answer 2

Thanks :)

Answer 3

welcome