Answer:
Radioactive isotopes are unstable and will decay. ... The isotopes will decay into a stable isotope over time. Scientists can tell how old the rock was from looking at the radioactive isotope's half-life, which tells them how long it would take for there to be half the radioactive isotope and half the stable isotope.
China
china is indeed a rising economic giant. The main reason why China has been doing well in latin America is simply because they do not have additional intrests beyond business. USA democratic dream is seen as a form of bullying by of these goernnments whose record for human rights is also below par.
A language isolation, in the absolute sense, is a natural language with no demonstrable genealogical or genetic relationship with other languages, one that has not been demonstrated to descend from an ancestor common with any other language.
Answer:
Weather is the day-to-day state of the atmosphere in a region and its short-term (minutes to weeks) variations, whereas climate is defined as statistical weather information that describes the variation of weather at a given place for a specified interval.
Answer: c. paleomagnetic data from ocean crust
Explanation:
Alfred Wegener was a German meteorologist and geophysicist, who in 1915 published his work <em>"The Origin of Continents and Oceans"</em> with a hypothesis that was radical for his time.
In this publication he proposed that during the end of the Paleozoic period and the beginning of the Mesozoic period the land masses were united in a single supercontinent, which he called <u>Pangea</u>, which was surrounded by a huge ocean, which he called <u>Panthalassa</u>. As proof of this, he was based on the way in which the coasts of Africa and South America seemed to fit on each side of the Atlantic Ocean, as if it were a puzzle. In addition to <u>the distribution of certain geological formations, native flora and fauna and the fossils found in the northern continents and places currently geographically far from each other. </u>
At the time, this idea was not accepted and Wegener was ridiculed by the scientific community, because despite its evidence, in its publication did not explain how those land masses moved.
Years later, in the decade of 1960, the theory of plate tectonics related to the movement of the continents according to the paleomagnetic evidence was developed and it was shown that Wegener was right.
