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Why do Radioactive elements inside the planet release heat now but why was so much more heat released earlier in earths history that is released now?
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Describe three ways earth got hotter in its early history?
Heat was produced for the molten stage of Earth by three separate occurrences. These occurrences were impacts by meteorites, the impact of the moon, and by the process of decay in radioactive elements.
Why was fluorescence invented?
It was not invented. It exists as a natural thing and has been known throughout all human history. Micro-organisms in water will give of phosphoresence and various glowing chemicals (mostly containing phosphorus) were known. Radium and other radioactive elements and compounds were also known but not understood. So... nobody invented it. Just like electricity, it has always been there as a part of the natural environment.
Why are there natural elements in the periodic table?
Originally according to western Oregon universities' site: "brief history of the periodic table" the creators wanted a way to track the elements. Originally it was just the elements found in nature. The man made elements came later and were added to the already widely used table. I don't have WOU'S site for reference but you can find it easily from google. Or just type in" brief history of periodic table" into you favorite search engine.
What are similarities or differences between the ancient Greek philosophers Leucippus and Democritus concept of the atom and Dalton's atomic theory?
The early philisophers (Leukippus and Democritus) 2500 years ago couldnt prove that atoms existed, and people had not discovered the study of matter yet. The idea of Greeks was genial but is only a philosophical suppostion, only that.Dalton combined the idea of elements with the earlier history of the atom, and the chemical and physical knowledge from 1800.
Can you see individual DNA strands or genes in karyotypes?
nope you see chromosomes. which are each a single tightly wound strand of DNA but you cant make out that out. can see genes at all unless your looking at a sequence or have a florescent or radioactive tag.
What are two radioactive elements used to determine absolute age?
The half-life of Carbon 14 and radionuclides are used to estimate the absolute (versus relative) age of pre-history items.
How is propaganda a departure from the earlier history of art?
it is not a departure
What are the 7 elements of history?
The seven elements of history are:PeoplePlaceEventsInteractionEnvironmentCultureNatural resources
What did Euclid contribute to history?
The Elements, a book explaining all about the elements.
How does the modern study of history challenge earlier histories?
By questioning weather there source are reliable. (APEX)
What are the common elements of drama?
history, tragedy, and comedy
When was A History of Violence released?
A History of Violence was released on 09/23/2005.
When was The History Boys released?
The History Boys was released on 11/21/2006.
What is the first book of history in the old testament?
The usual answer is Joshua, though the book of Genesis was earlier and contains a great deal of history.
What colony was between Florida and Virginia?
Earlier in history it was the Carolinas. Later, Georgia was made.
Which policy of a communist leader in earlier soviet history is perestroika most similar to?
NED
When was American History X released?
American History X was released on 10/30/1998.
