Answer:
Seafloor spreading occurs along mid-ocean ridges large mountain ranges rising from the ocean floor.
Explanation:
The Mid-Atlantic Ridge, for instance, separates the North American plate from the Eurasian plate, and the South American plate from the African plate.
<em><u>Venezuela is the major producer for oil.</u></em>
Just in case you need to know how much they produced.
In 2006 they produced- 2,511 of oil.
In 2007 they produced- 2,433
In 2008 - 2,394
In 2009- 2,239
In 2010- 2,146
In 2011- 2,240
A radioactive element with a half-life of 1,000 years, and starting mass of 20 grams, will need 2,000 years to decrease to 5 grams.
Explanation:
The radioactive elements all have a specific half-life. Each element's half-life is well known, and they are used by scientists of numerous fields as they are excellent for determining the age of a particular item, be it or organic or non-organic nature. In this case, we have a radioactive element with a half-life of 1,000 years, and starting mass of 20 grams.
The half-life basically means that half of the mass of an element is lost during a particular period of time. For the element in question we need to find out how much time will be needed for it to decrease to 5 grams. In order to get to the result, we just need to add 1,000 years on every decrease of half of the mass:
20/2 = 10
10/2 = 5
So in 1,000 years, the element in question will decrease to 10 grams, and in further 1,000 years (2,000 cumulatively) it will decrease to 5 grams.
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4" (and any subsequent words) was ignored because we limit queries to 32 words.
Just learned this the 5 stages are
fixation or volatilization, mineralization, nitrification, immobilization, and denitrification.
Hope this helps
