https://padlet.com/steph5756/38c8j54yqrf0 en-us 2017-01-27 14:43:12 UTC 2025-12-01 21:35:57 UTC hello@padlet.com steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887849 Discovered evidence, during the years 1830-1833, supporting the idea of uniformitatianism which is the "idea that the Earth was shaped entirely by slow-moving forces acting over a very long period of time." This idea was not well accepted during his time as the idea of catastrophism, "a geologic idea that uses biblical chronology to date the Earth," was more accepted. ]]> 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887849 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887855 Discovered how to calculate the age of rocks in 1907 by "measuring the rate of its radioactive decay." Based on this research, he claimed Earth's age to be 2.2 billion years. (Although today we think this age is twice as old, his estimated age was a huge leap during that time.) "Boltwood's formulas are compatible with several radioactive elements, including carbon-14, which has been used to date historical artifacts."]]> 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887855 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887860 Developed the first scientific model of clouds, discovered what keeps hurricanes whirling forward, and revealed what drives the atmospheric currents in the tropics]]> 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887860 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887863 contributed knowledge about shape and size of earth, and proved that the earth is not the center of the solar system because its the sun]]> 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887863 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887864 Cosmic Radiation: In 1912, he traveled to 17,500 ft. in a hot air balloon (no oxygen) and observes that radiation increases with altitude. While he further explored, he was convinced that radiation is coming from space.]]> 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887864 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887865 Wrote one of the first papers on glacial movements and deposits. ]]> 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887865 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887867 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887867 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887868 He developed a theory relating Earth's motion to long-term climate change and ice ages. He came up with a mathematical theory of climate uses variations in solar radiation based on season and latitude.]]> 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887868 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887870 Discovered the irregularity in the moons motion, known as evection and made original observations about the motions of the planets. ]]> 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887870 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887871 He discovered that hundreds of flat-topped mountains, possibly sunken islands, that snap the Pacific floor. Later, in 1960 he proposed that the movement of continents was a result of sea-floor spreading.]]> 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887871 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887872 discovered in the 1890s "that the atmosphere consists of layers. Bort notices that air temperature decreases steadily up to about seven miles, but remains constant at higher altitudes. After more than 200 balloon experiments, he suggests that the atmosphere is divided into two layers called the 'troposphere' and the 'stratosphere.'"]]> 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887872 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887874 He developed the first geological map of Germany and was the first to determine that granites were formed by igneous processes and that the Alps resulted from an upheaval in the earth's crust.]]> 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887874 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887875 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887875 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887877 Discovered, in 1906, that the speed of earthquake waves becomes faster with greater depth of penetration into the Earth]]> 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887877 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887878 His studies of the S Pacific, NW United States, Europe, and elsewhere led to changes in ideas on mountain building, volcanism, and the origin of the continents and oceans. ]]> 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887878 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887880 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887880 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887881 Recognized the order of rock layers and tried to explain them by formulating rules for a general interpretation of sediments. He succeeded, creating the main principles of modern stratigraphy that we still use today.]]> 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887881 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887882 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887882 steph5756 https://padlet.com/steph5756/38c8j54yqrf0/wish/149887883 Developed the theory of continental drift to explain why the continents look like pieces of puzzles that are no longer together (Pangea)]]> 2017-01-27 14:43:12 UTC https://padlet.com/steph5756/38c8j54yqrf0/wish/149887883