https://padlet.com/3049891/q1isnkisyq44 Made with the strength to succeed en-us 2018-01-16 18:29:23 UTC 2023-06-01 14:32:25 UTC hello@padlet.com 3049891 https://padlet.com/3049891/q1isnkisyq44/wish/221829059 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 18:30:55 UTC https://padlet.com/3049891/q1isnkisyq44/wish/221829059 3049891 https://padlet.com/3049891/q1isnkisyq44/wish/221830392 The term rock strata refers to stacked-up layers of sedimentary rock. Other kinds of rocks can have layering in them, but the word strata is reserved for sedimentary rocks - rocks composed of individual fragments of minerals or other rocks.]]> 2018-01-16 18:33:49 UTC https://padlet.com/3049891/q1isnkisyq44/wish/221830392 3049891 https://padlet.com/3049891/q1isnkisyq44/wish/221831071 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 18:35:41 UTC https://padlet.com/3049891/q1isnkisyq44/wish/221831071 3049891 https://padlet.com/3049891/q1isnkisyq44/wish/221831803 A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, hair, petrified wood, oil, coal, and DNA remnants.]]> 2018-01-16 18:37:37 UTC https://padlet.com/3049891/q1isnkisyq44/wish/221831803 3049891 https://padlet.com/3049891/q1isnkisyq44/wish/221832235 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. ... Earthformed around 4.54 billion years ago by accretion from the solar nebula.]]> 2018-01-16 18:38:34 UTC https://padlet.com/3049891/q1isnkisyq44/wish/221832235 3049891 https://padlet.com/3049891/q1isnkisyq44/wish/221832955 the time taken for the radioactivity of a specified isotope to fall to half its original value.]]> 2018-01-16 18:40:11 UTC https://padlet.com/3049891/q1isnkisyq44/wish/221832955 3049891 https://padlet.com/3049891/q1isnkisyq44/wish/221833832 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 18:41:52 UTC https://padlet.com/3049891/q1isnkisyq44/wish/221833832 3049891 https://padlet.com/3049891/q1isnkisyq44/wish/221834573 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 18:43:21 UTC https://padlet.com/3049891/q1isnkisyq44/wish/221834573 3049891 https://padlet.com/3049891/q1isnkisyq44/wish/221835232 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 18:44:36 UTC https://padlet.com/3049891/q1isnkisyq44/wish/221835232 3049891 https://padlet.com/3049891/q1isnkisyq44/wish/221836262 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 18:46:35 UTC https://padlet.com/3049891/q1isnkisyq44/wish/221836262