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
21,754,862 questions answered
Popular Conversations
There is a single instrument to measure climate change.
Weegy: There is a single instrument to measure climate change. FALSE. User: How do landfills contribute to global ...
7/29/2015 8:14:02 AM| 2 Answers
Which of the following is the best example of use of voice in a ...
Weegy: The answer is: D. a narrative about the food served in middle-school cafeterias. User: What is the best word ...
7/29/2015 9:00:04 AM| 2 Answers
After Alexander's death, Egypt was ruled by ...
Weegy: After Alexander's death, Egypt was ruled by Ptolemy. User: The philosophy that believed pleasure was the ...
7/29/2015 4:01:30 PM| 2 Answers
16. What kind of wines is Portugal most famous for? A. ...
Weegy: D. Port User: 17. The single most important ingredient in a good beer is high-quality A. malt. ...
7/29/2015 5:23:37 PM| 2 Answers
Choose the correct definition for extremo. A. extra B. ...
Weegy: end is the correct definition for extremo. User: Choose the correct translation for Yo puedo hacerlo. ...
7/29/2015 6:40:23 PM| 2 Answers
Weegy Stuff
S
1
L
Points 853 [Total 1364]| Ratings 1| Comments 843| Invitations 0|Offline
S
P
C
L
P
L
1
P
P
1
P
1
P
L
Points 682 [Total 10216]| Ratings 3| Comments 632| Invitations 2|Offline
S
L
L
Points 348 [Total 8548]| Ratings 5| Comments 298| Invitations 0|Offline
S
Points 249 [Total 249]| Ratings 1| Comments 239| Invitations 0|Offline
S
Points 193 [Total 193]| Ratings 1| Comments 183| Invitations 0|Online
S
1
L
L
Points 83 [Total 8463]| Ratings 0| Comments 83| Invitations 0|Offline
S
Points 65 [Total 65]| Ratings 0| Comments 65| Invitations 0|Offline
S
Points 50 [Total 50]| Ratings 3| Comments 20| Invitations 0|Offline
S
Points 41 [Total 41]| Ratings 2| Comments 21| Invitations 0|Offline
S
Points 18 [Total 318]| Ratings 0| Comments 18| Invitations 0|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2015 Purple Inc.