https://padlet.com/305178/q7mhtw2zd2co en-us 2018-01-16 18:32:50 UTC 2024-11-07 20:20:06 UTC hello@padlet.com 305178 https://padlet.com/305178/q7mhtw2zd2co/wish/221830454 The geologic time scale is a system of chronological dating that relates geological strata to time. It is used by geologists, paleontologists, and other Earth scientists to describe the timing




]]> 2018-01-16 18:33:56 UTC https://padlet.com/305178/q7mhtw2zd2co/wish/221830454 305178 https://padlet.com/305178/q7mhtw2zd2co/wish/221831298 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 18:36:14 UTC https://padlet.com/305178/q7mhtw2zd2co/wish/221831298 305178 https://padlet.com/305178/q7mhtw2zd2co/wish/221831826 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 18:37:41 UTC https://padlet.com/305178/q7mhtw2zd2co/wish/221831826 305178 https://padlet.com/305178/q7mhtw2zd2co/wish/221832594 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 18:39:18 UTC https://padlet.com/305178/q7mhtw2zd2co/wish/221832594 305178 https://padlet.com/305178/q7mhtw2zd2co/wish/221833285 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. ... Earth formed around 4.54 billion years ago by accretion from the solar nebula.




]]> 2018-01-16 18:40:49 UTC https://padlet.com/305178/q7mhtw2zd2co/wish/221833285 305178 https://padlet.com/305178/q7mhtw2zd2co/wish/221834205 In order to determine the age of a geologic material, we must understand the concept of half-life. Half-lifeis a term that describes time. The definition is: The time required for one-half of the radioactive (parent) isotopes in a sample to decay to radiogenic (daughter) isotopes.Nov 8, 2016

]]> 2018-01-16 18:42:36 UTC https://padlet.com/305178/q7mhtw2zd2co/wish/221834205 305178 https://padlet.com/305178/q7mhtw2zd2co/wish/221835244 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 18:44:37 UTC https://padlet.com/305178/q7mhtw2zd2co/wish/221835244 305178 https://padlet.com/305178/q7mhtw2zd2co/wish/221836514 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 18:47:07 UTC https://padlet.com/305178/q7mhtw2zd2co/wish/221836514 305178 https://padlet.com/305178/q7mhtw2zd2co/wish/221837056 Radioactive decay  is the process by which an unstable atomic nucleus loses energy 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 18:48:18 UTC https://padlet.com/305178/q7mhtw2zd2co/wish/221837056 305178 https://padlet.com/305178/q7mhtw2zd2co/wish/221838321  Earth formed around 4.54 billion years ago by accretion from the solar nebula.


]]> 2018-01-16 18:51:03 UTC https://padlet.com/305178/q7mhtw2zd2co/wish/221838321