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Population change
Explanation:
The change in the number of people living in a city, county, state, province or nation is generally referred to as population change.
Population change is positive when there is an increase in population;
Population change is negative when there is a decrease in population.
- Population is dynamic and it changes over a length of time.
- Migration is one of the leading cause of population changes.
- When people move away from an area, it is called emigration. It is a negative population change
- When people moves to an area, it is positive population change called immigration.
- Other cause of population changes are war, vices, economy, employment opportunities, education etc.
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The hydrologic cycle describes the continuous movement of water above, on, and below the surface of the Earth. The water on the Earth's surface--surface water--occurs as streams, lakes, and wetlands, as well as bays and oceans. Surface water also includes the solid forms of water-- snow and ice. The water below the surface of the Earth primarily is ground water, but it also includes soil water.
The hydrologic cycle commonly is portrayed by a very simplified diagram that shows only major transfers of water between continents and oceans, as in Figure 1. However, for understanding hydrologic processes and managing water resources, the hydrologic cycle needs to be viewed at a wide range of scales and as having a great deal of variability in time and space. Precipitation, which is the source of virtually all freshwater in the hydrologic cycle, falls nearly everywhere, but its distribution is highly variable. Similarly, evaporation and transpiration return water to the atmosphere nearly everywhere, but evaporation and transpiration rates vary considerably according to climatic conditions. As a result, much of the precipitation never reaches the oceans as surface and subsurface runoff before the water is returned to the atmosphere. The relative magnitudes of the individual components of the hydrologic cycle, such as evapotranspiration, may differ significantly even at small scales, as between an agricultural field and a nearby woodland.
Answer: Sea-floor spreading — In the early 1960s, Princeton geologist Harry Hess proposed the hypothesis of sea-floor spreading, in which basaltic magma from the mantle rises to create new ocean floor at mid-ocean ridges. ... A test of the hypothesis of sea-floor spreading was provided by studies of the Earth's magnetism.
Answer:
Rocks turn into soil through the process of weathering. Weathering is when rocks are broken down into smaller pieces.
Explanation:
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