https://padlet.com/3045301/chtdzwauaj99 Made with a wink and a smile en-us 2018-01-16 16:34:56 UTC 2023-07-11 14:28:03 UTC hello@padlet.com 3045301 https://padlet.com/3045301/chtdzwauaj99/wish/221777570 The geologic time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time. It is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that have occurred during Earth's history.]]> 2018-01-16 16:38:00 UTC https://padlet.com/3045301/chtdzwauaj99/wish/221777570 3045301 https://padlet.com/3045301/chtdzwauaj99/wish/221779632 In geology and related fields, a stratum is a layer of sedimentary rock or soil, or igneous rock where formed at the earth's surface, with internally consistent characteristics that distinguish it from other layers]]> 2018-01-16 16:42:29 UTC https://padlet.com/3045301/chtdzwauaj99/wish/221779632 3045301 https://padlet.com/3045301/chtdzwauaj99/wish/221780400 The Rock Cycle is a group of changes. Igneous rock can change into sedimentary rock or into metamorphic rock. Sedimentary rock can change into metamorphic rock or into igneous rock. Metamorphic rock can change into igneous or sedimentary rock. Igneous rock forms when magma cools and makes crystals.]]> 2018-01-16 16:44:06 UTC https://padlet.com/3045301/chtdzwauaj99/wish/221780400 3045301 https://padlet.com/3045301/chtdzwauaj99/wish/221781646 A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age.]]> 2018-01-16 16:46:38 UTC https://padlet.com/3045301/chtdzwauaj99/wish/221781646 3045301 https://padlet.com/3045301/chtdzwauaj99/wish/221782884 The history of Earth concerns the development of planet Earth from its formation to the present day. Nearly all branches of natural science have contributed to the understanding of the main events of Earth's past]]> 2018-01-16 16:49:06 UTC https://padlet.com/3045301/chtdzwauaj99/wish/221782884 3045301 https://padlet.com/3045301/chtdzwauaj99/wish/221783724 Radiometric dating or radioactive dating is a technique used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they were formed. ]]> 2018-01-16 16:51:10 UTC https://padlet.com/3045301/chtdzwauaj99/wish/221783724 3045301 https://padlet.com/3045301/chtdzwauaj99/wish/221785152 Radiocarbon dating is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon]]> 2018-01-16 16:54:12 UTC https://padlet.com/3045301/chtdzwauaj99/wish/221785152 3045301 https://padlet.com/3045301/chtdzwauaj99/wish/221786102  The spontaneous transformation of an unstable atomic nucleus into a lighter one, in which radiation is released in the form of alpha particles, beta particles, gamma rays, and other particles.]]> 2018-01-16 16:55:54 UTC https://padlet.com/3045301/chtdzwauaj99/wish/221786102 3045301 https://padlet.com/3045301/chtdzwauaj99/wish/221786959 The age of the Earth is approximately 4.54 ± 0.05 billion years (4.54 × 10⁹ years ± 1%). This dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.]]> 2018-01-16 16:57:45 UTC https://padlet.com/3045301/chtdzwauaj99/wish/221786959 3045301 https://padlet.com/3045301/chtdzwauaj99/wish/221787783 the time taken for the radioactivity of a specified isotope to fall to half its original value.]]> 2018-01-16 16:59:28 UTC https://padlet.com/3045301/chtdzwauaj99/wish/221787783