What are cons for building hydroelectric dams?

Rocks that contain crystals that are roughly equal in size and can be identified with the unaided eye are said to exhibit a texture.

Which feature of a map shows the relationship between a distance on a map and that distance on earth? key scale grid system compass rose

Which revelation resulted from the observation of the spectrum of different galaxies? a. there were more galaxies whose spectrum was blueshifted b. there were no galaxies whose spectrum was redshifted c. there were more galaxies whose spectrum was redshifted d. there were no galaxies whose spectrum was blueshifted