What geologic event caused the dry flat physical landscape of the prairie A) tectonic plates under the earth shifted
B) glaciers in the arctic circle melted
C) wind storms in the midwest flattened the land
D) fires in the midwest scoured the soil

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

Which two following best identify the central themes of this speech in the passage the man in the arena

Liquefaction is a. a quicksand-like condition arising in some wet soils during earthquakes. b. flooding caused by tsunamis. c. flooding of coastal areas due to tectonic subsidence. d. flooding caused by dam failure resulting from an earthquake.