Mathematics 31


Book Description










Trees and Shrubs of Alberta


Book Description

Seventy-seven of Alberta's native and naturalized trees and shrubs are described and illustrated in this comprehensive pictorial field guide. Featuring such common coniferous species as spruces, pines and junipers, it also reveals the wide range of Alberta's deciduous trees. Trees and Shrubs of Alberta includes: * 180 colour photos and line drawings showing each plant's bark, leaves, flowers, fruits and cones * Descriptions of edible fruits and berries * Medicinal, aboriginal, historical and current uses * Clear, non-technical descriptions to aid identification * Habitat keys and distribution maps * Name origins and alternate names * comprehensive glossary. * Trees and Shrubs of Alberta is an invaluable resource for professional and amateur naturalists alike.










Science in Action 9


Book Description




The Mountain Mystery


Book Description

Fifty years ago, no one could explain mountains. Arguments about their origin were spirited, to say the least. Progressive scientists were ridiculed for their ideas. Most geologists thought the Earth was shrinking. Contracting like a hot ball of iron, shrinking and exposing ridges that became mountains. Others were quite sure the planet was expanding. Growth widened sea basins and raised mountains. There was yet another idea, the theory that the world's crust was broken into big plates that jostled around, drifting until they collided and jarred mountains into existence. That idea was invariably dismissed as pseudo-science. Or "utter damned rot" as one prominent scientist said. But the doubtful theory of plate tectonics prevailed. Mountains, earthquakes, ancient ice ages, even veins of gold and fields of oil are now seen as the offspring of moving tectonic plates. Just half a century ago, most geologists sternly rejected the idea of drifting continents. But a few intrepid champions of plate tectonics dared to differ. The Mountain Mystery tells their story.