The zone of proximal development, often abbreviated as ZPD, is the difference between what a learner can do without help and what he or she cannot do. It is a concept introduced, yet not fully developed, by Soviet psychologist Lev Vygotsky (1896â1934) during the last ten years of his life.
Report Abuse. 1  Baguio City Elevation. 2  The city is at an altitude of approximately 1500 meters (5100 ft) in a moist tropical pine forest conducive to the growth of mossy plants and orchids. 3  It is over 5,00Today: Cloudy with showers.  try yahoo weather.
Just like Mauna Keaâs height, with 10,000 m (33,500 feet) under sea level, underwater volcanoes and their eruptions often go unnoticed. And because the usual signs like rumbling and smoke are harder to detect, it is all the more spectacular when an underwater volcano visibly erupts.