Question and answer
Question not found
Ask a question
Not a good answer? Get an answer now. (Free)
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
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
Question
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
Rated good by amis66
What is the economic inportant of rivers in africa
Question
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 of life can be inferred from shared sets of biochemical and morphological traits, or by shared DNA sequences. These homologous traits and sequences are more similar among species that share a more recent common ancestor, and can be used to reconstruct evolutionary histories, using both existing species and the fossil record. Existing patterns of biodiversity have been shaped both by speciation and by extinction.[2] Charles Darwin was the first to formulate a scientific argument for the theory of evolution by means of natural selection. Evolution by natural selection is a process that is inferred from three facts about populations: 1) more offspring are produced than can possibly survive, 2) traits vary among individuals, leading to differential rates of survival and reproduction, and 3) trait differences are heritable.[3] Thus, when members of a population die they are replaced by the progeny of parents that were better adapted to survive and reproduce in the environment in which natural selection took place. This process creates and preserves traits that are seemingly fitted for the functional roles they perform.[4] Natural selection is the only known cause of adaptation, but not the only known cause of evolution. Other, nonadaptive causes of evolution include mutation and genetic drift.[5] In the early 20th century, genetics was integrated with Darwin's theory of evolution by natural selection through the discipline of population genetics. The importance of natural selection as a cause of evolution was accepted into other ... (More)
Question
Expert Answered
Asked 5/4/2012 6:43:04 AM
0 Answers/Comments
How do i check my email
Weegy: Just enter your username/emaid add and password to the website. (More)
Question
Expert Answered
Asked 5/4/2012 8:21:42 AM
0 Answers/Comments
17,891,469 questions answered
Popular Conversations
Choose the product. -7p3(4p2 + 3p - 1)
Weegy: -7p3(4p2 3p - 1) = 7p3 - 84p6. Source: User: Find the quotient. 42j4k2 ÷ (-3j3k) Weegy: = 42j k /- 3j k) = ...
10/19/2014 5:43:50 PM| 3 Answers
Describe the key differences between managing and leading.
Weegy: ]
10/19/2014 5:51:01 PM| 3 Answers
Find the sum and choose the correct answer. 2n3 + 4n2 - 7 and -n3 + ...
Weegy: (2 n^3+4 n^2-7)+(-n^3+8 n-9) your answer is n^3+4 n^2+8 n-16 User: Select the correct difference. -3z7 - ...
10/19/2014 5:41:21 PM| 2 Answers
Weegy Stuff
S
L
1
1
1
1
L
1
L
Points 2156 [Total 14531]| Ratings 0| Comments 2156| Invitations 0|Offline
S
L
1
L
P
C
1
P
C
1
L
Points 1393 [Total 10874]| Ratings 3| Comments 1363| Invitations 0|Offline
S
1
L
1
L
P
P
L
Points 740 [Total 12969]| Ratings 0| Comments 740| Invitations 0|Offline
S
1
L
L
Points 445 [Total 6239]| Ratings 3| Comments 415| Invitations 0|Online
S
L
Points 423 [Total 1822]| Ratings 0| Comments 423| Invitations 0|Offline
S
Points 396 [Total 396]| Ratings 0| Comments 366| Invitations 3|Offline
S
Points 269 [Total 270]| Ratings 2| Comments 249| Invitations 0|Online
S
Points 160 [Total 160]| Ratings 1| Comments 150| Invitations 0|Offline
S
P
C
L
P
L
1
Points 48 [Total 6282]| Ratings 0| Comments 48| Invitations 0|Offline
S
Points 27 [Total 27]| Ratings 0| Comments 27| Invitations 0|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2014 Purple Inc.