https://padlet.com/3065701/7ds4t2a4chv1 Made with serendipity en-us 2018-01-16 21:56:46 UTC 2024-07-17 16:57:28 UTC hello@padlet.com 3065701 https://padlet.com/3065701/7ds4t2a4chv1/wish/221903733 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 22:01:32 UTC https://padlet.com/3065701/7ds4t2a4chv1/wish/221903733 3065701 https://padlet.com/3065701/7ds4t2a4chv1/wish/221903871 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 22:02:11 UTC https://padlet.com/3065701/7ds4t2a4chv1/wish/221903871 3065701 https://padlet.com/3065701/7ds4t2a4chv1/wish/221904766 the half-life of a radioactive substance is the amount of time it takes for half of its atoms to decay, and the half-life of a drug is the amount of time it takes before half of the active elements are either eliminated or broken down by the body.]]> 2018-01-16 22:06:27 UTC https://padlet.com/3065701/7ds4t2a4chv1/wish/221904766 3065701 https://padlet.com/3065701/7ds4t2a4chv1/wish/221905320 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 22:09:24 UTC https://padlet.com/3065701/7ds4t2a4chv1/wish/221905320 3065701 https://padlet.com/3065701/7ds4t2a4chv1/wish/221905525 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 22:10:37 UTC https://padlet.com/3065701/7ds4t2a4chv1/wish/221905525 3065701 https://padlet.com/3065701/7ds4t2a4chv1/wish/221906174 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 22:14:33 UTC https://padlet.com/3065701/7ds4t2a4chv1/wish/221906174 3065701 https://padlet.com/3065701/7ds4t2a4chv1/wish/221907541 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 22:22:23 UTC https://padlet.com/3065701/7ds4t2a4chv1/wish/221907541 3065701 https://padlet.com/3065701/7ds4t2a4chv1/wish/221907939 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. Wikipedia

]]> 2018-01-16 22:24:25 UTC https://padlet.com/3065701/7ds4t2a4chv1/wish/221907939 3065701 https://padlet.com/3065701/7ds4t2a4chv1/wish/221908059 Radioactive decay (also known as nuclear decay orradioactivity) is the process by which an unstable atomic nucleus loses energy (in terms of mass in its rest frame) by emitting radiation, such as an alpha particle, beta particle with neutrino or only a neutrino in the case of electron capture, gamma ray, or electron ...]]> 2018-01-16 22:25:13 UTC https://padlet.com/3065701/7ds4t2a4chv1/wish/221908059 3065701 https://padlet.com/3065701/7ds4t2a4chv1/wish/222210450 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.]]> 2018-01-17 19:38:29 UTC https://padlet.com/3065701/7ds4t2a4chv1/wish/222210450