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Questions asked by the same visitor
What is climate
Question
Updated 5/4/2012 3:07:35 AM
1 Answer/Comment
Climate encompasses the statistics of temperature, humidity, atmospheric pressure, wind, precipitation, atmospheric particle count and other meteorological elemental measurements in a given region over long periods. Climate can be contrasted to weather, which is the present condition of these elements and their variations over shorter periods.

Added 5/4/2012 3:07:35 AM
what are the importance of volcanic rock to man
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Updated 6/17/2012 3:19:29 AM
1 Answer/Comment
Volcanic rocks are geologically important because:

1. their minerals and global chemistry give information about the composition of the mantle, from which some igneous rocks are extracted, and the temperature and pressure conditions that allowed this extraction, and/or of other pre-existing rock that melted;

2. their absolute ages can be obtained from various forms of radiometric dating and thus can be compared to adjacent geological strata, allowing a time sequence of events;

3. their features are usually characteristic of a specific tectonic environment, allowing tectonic reconstitutions (see plate tectonics);

4. in some special circumstances they host important mineral deposits (ores): for example, tungsten, tin, and uranium are commonly associated with granites and diorites, whereas ores of chromium and platinum are commonly associated with gabbros.
Added 6/17/2012 3:19:29 AM
What is the economic inportant of rivers in africa
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Updated 5/4/2012 7:03:38 AM
1 Answer/Comment
The Niger has served as a focal point for the development of African civilizations, particularly the ancient kingdoms of Ghana and Mali. It continues to play a key role in the region, serving as a source of livelihood for many West African farmers, fishers, and herders, as a transportation route in areas that are otherwise poorly connected, and as a source of energy.

Added 5/4/2012 7:03:38 AM
What is evolution?
Weegy: Evolution is any change across successive generations in the heritable characteristics of biological populations. [ Evolutionary processes give rise to diversity at every level of biological organisation, including species, individual organisms and molecules such as DNA and proteins.[1] Life on Earth originated and then evolved from a universal common ancestor approximately 3.7 billion years ago. Repeated speciation and the divergence ... (More)
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Expert Answered
Asked 5/4/2012 6:43:04 AM
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How do i check my email
Weegy: Just enter your username/emaid add and password to the website. (More)
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Expert Answered
Asked 5/4/2012 8:21:42 AM
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