The decline or weakening of Mesoamerican civilizations can be attributed to two "natural" causes in addition to deliberate attacks by Spanish invaders. What were these two causes? 1. lack of agricultural skill and loss of fertile farmland
2. overpopulation and lack of domesticated animals
3. infectious diseases and drought
4. floods and an earthquake

How did the location of islamic lands make cultural diffusion possible

What event had weakened florida’s economy immediately before the start of the great depression? a) the freezing of orange trees b) the end of florida’s land boom c) the start of another world war d) the building of florida’s railroads

Marine exptoration of oil uses seismic waves to locate oil in the seabed. what is a negative impact from seismic waves on the aquatic ecosystem of the ocean? a. seismic waves kill microoganisms b. seismic waves disrupts the sand and causes seafloor erosion c. seismic waves have virtually no adverse affects on marine life d. seismic waves damage the sonar that dolphins and whales use to orient themselves underwater