Radioactive dating moon
Thus the Ar-40/K-40 ratio gives us the age since the rock last melted, or the 'crystallization age' of the rock.time Ar/K ratio ------ ---------- 0 0 / 16 (assumed starting point = 0; "solidification age" when no gas would be retained in rock) 1.25 BY 8 / 8 = 1 (half of the 8 remaining K decay) 2.50 12 / 4 = 3 (half of the 4 remaining K decay) 3.75 14 / 2 = 7 (half of the 2 remaining K decay) 5.00 15 / 1 = 15 so the age of the Moon rocks must be between 3.75 and 5.00 BY, from our very crude estimates.The M&M experiment: This is a very dangerous experiment. There the neutron knocks a proton out of the nucleus and turns N-14 -- C-14.Don't perform it without special clothing and supervision. (If it knocks out another neutron, no change occurs.) That C-14 behaves like C-12 and so is incorporated into a piece of broccoli which you eat and you then have C-14 in you.The uranium is locked into rocks but when the uranium becomes radon, the radon, being a gas, bubbles out of the rocks and into your house.
THE EARTH IS WARM (witness volcanoes; the inside of the Earth flows, generating Earthquakes). The heat flow from the whole earth is 3.2 x 10^13 Watts, i.e. (iodine, barium used in medical work, e.g.; plutonium, uranium used for nuclear energy; we can predict exactly the rate at which they will produce energy). If you look at a periodic table of the elements, you find that the atomic number of carbon is 12 but the atomic weight is 12.011.To achieve this revised date, an international team led by Seth Jacobson from Observatoire de la Côte d’Azur in Nice, France, devised a new method based on measurements of the Earth’s interior combined with computer simulations of the protoplanetary disk from which the Earth and other planets formed.They started by simulating the growth of the “terrestrial planets” Mercury, Venus, Earth, and Mars from the planetary building blocks orbiting the Sun.There are many elements that are radioactive or have radioactive isotopes. But since C-14 is unstable, even if it forms in stars it won't make it to the Earth since it has such a short half-life.Concept of half-lives: experiment with coins (or M&Ms) or student birthdays. But cosmic rays (high energy neutrons) collide with N-14 at heights of 1.6 km.