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.
A.^ Height above sea level is the usual choice of definition for elevation. In terms of the point farthest away from the centre of the Earth, Chimborazo in Ecuador (6,267 m (20,561 feet)) can be considered the planet's most extreme high point. This is due to the Earth's oblate spheroid shape, with points near the Equator being farther out from the centre than those at the poles.