The features that form when the land surfaces caves into large subsurface voids created by solution of bedrock some distance beneath the surface are called ______________. (two words)
Fill in the blank(s) with correct word
collapse sinkholes
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In an essay discuss the significant environmental issues facing South Asia
What will be an ideal response?
In the northeastern United States, emissions of ____ are primarily responsible for acid precipitation
a. ?benzene b. ?sulfur dioxide c. ?carbon monoxide d. ?volatile organic compounds e. ?CFCs
The concept of overlay in geographic information systems (GIS) refers to the
A) incorporation of multiple types of digital spatial data (maps) in answering research questions. B) constant, automatic updating of digital spatial data (maps) of the same type with newer data. C) use of digital spatial data (maps) to identify what lies deep beneath the Earth's surface. D) inclusion of a grid (such as latitude-longitude or universal Transverse Mercator) on a digital spatial dataset (map).
The majority of sea-level rise results from which of the following?
A) melting of ice on land. B) changes in thermohaline circulation. C) melting of icebergs. D) melting of sea ice. E) thermal expansion of seawater.