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OBSERVATION. “Instead, electrons are dislodged only by the impingement of photons when those photons reach or exceed a threshold frequency (energy).” https://lnkd.in/eDZvjevE View in LinkedIn

RELATIVE AMOUNTS. “Calcium, magnesium, and potassium ions in rainwater come both from oceanic salts and from land surfaces. Both calcium and magnesium increase with respect to sodium and chloride over land areas, and calcium increases more than magnesium.” https://lnkd.in/ete8CApd View in LinkedIn

DISCREPANCY. “Yet, the experimental results did not correlate with either of the two predictions made by classical theory.” https://lnkd.in/eDZvjevE View in LinkedIn

SEASONALITY. “The chloride content of rainwater shows a marked seasonal trend; and, as mentioned above, inland rain generally contains less chloride than coastal rain.” https://lnkd.in/ete8CApd View in LinkedIn

KEY LAG. “Additionally, according to this theory, a sufficiently dim light would be anticipated to show a time lag between the initial shining of its light and the subsequent emission of an electron.” https://lnkd.in/eDZvjevE View in LinkedIn

IONIC GRADIENTS. “In rain deposited farther inland, the ratios Cl"1:Na+1, K+1:Na+1, and SO4"2:CH, expressed as parts per million, differ from those in sea water. A decrease in chloride content of rainwater with distance from the coast has been observed in many countries.” https://lnkd.in/ete8CApd View in LinkedIn

SODIUM CHLORIDE. “The major cations and anions of rainwater come from several sources. Salts are picked up by winds blowing across large stretches of open ocean.” https://lnkd.in/ete8CApd View in LinkedIn

ROLE OF RAINWATER. “Hot water and other fluids may transport these chemicals rapidly over great distances. Based on the role played by water, metamorphic rocks generally contain many elements that were absent from the original rock, and they lack some that were originally present.” https://lnkd.in/eSpeQsqS View in LinkedIn

ROCKS CONSTANTLY CHANGE. “Metasomatism is the drastic change in the bulk chemical composition of a rock, due to the introduction of chemicals from other surrounding rocks.” https://lnkd.in/eSpeQsqS View in LinkedIn

ADD TEMPERATURE AND PRESSURE. “Many complex reactions may take place, and each resultant mineral assemblage provides us with a clue regarding the temperatures and pressures at the time of metamorphism.” https://lnkd.in/eSpeQsqS View in LinkedIn