Can I use household bleach in my pool? A: The chlorine in household bleach can be used to sanitize swimming pools, though it is generally less concentrated than chlorine designed for pool use. Bleach additives can harm the pool, so a generic household bleach works best.
The atmosphere is the layer of air that stretches above the lithosphere. The Earthâs waterâon the surface, in the ground, and in the airâmakes up the hydrosphere. Since life exists on the ground, in the air, and in the water, the biosphere overlaps all these spheres.
Lionâs Head, a wave-lashed arch of stone on the Lake Superior shores of Ontarioâs Sleeping Giant Provincial Park, exemplifies the Canadian Shieldâs rugged beauty. Viewed by satellite, the face of Canada reveals six clearly defined landform regions: Cordillera, Interior Plains, Canadian Shield, Great LakesâSt. Lawrence, Appalachian, and Arctic. All these regions occupy significant portions of Canadaâs vast expanse. Each possesses similar geologic structures, physical features, climatic conditions, soils, and vegetation. Considered as a whole, Canadaâs landforms encompass an unrivaled diversity of landscapes: spectacular mountain ranges, sweeping plains, rocky uplands, temperate lowlands, and frigid tundra. The forces of nature â our daily weather, for example â actively shape landforms. Some forces level landforms, others rebuild them.