https://padlet.com/3039651/usrqjjvr92t6 Made with the best of intentions en-us 2018-01-16 16:55:07 UTC 2024-10-02 02:56:14 UTC hello@padlet.com 3039651 https://padlet.com/3039651/usrqjjvr92t6/wish/221787873  is a system of chronological dating that relates geological strata (stratigraphy) to time.]]> 2018-01-16 16:59:39 UTC https://padlet.com/3039651/usrqjjvr92t6/wish/221787873 3039651 https://padlet.com/3039651/usrqjjvr92t6/wish/221788746 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 17:01:46 UTC https://padlet.com/3039651/usrqjjvr92t6/wish/221788746 3039651 https://padlet.com/3039651/usrqjjvr92t6/wish/221789314 The Rock Cycle is a group of changes. Igneous rock can change into sedimentary rock or into metamorphic rock. ]]> 2018-01-16 17:03:13 UTC https://padlet.com/3039651/usrqjjvr92t6/wish/221789314 3039651 https://padlet.com/3039651/usrqjjvr92t6/wish/221789852 A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age.]]> 2018-01-16 17:04:26 UTC https://padlet.com/3039651/usrqjjvr92t6/wish/221789852 3039651 https://padlet.com/3039651/usrqjjvr92t6/wish/221790496 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 17:05:47 UTC https://padlet.com/3039651/usrqjjvr92t6/wish/221790496 3039651 https://padlet.com/3039651/usrqjjvr92t6/wish/221790933 Uranium 238 has a half-life of 4.5 billion years! Through decay Uranium-238 turns into stable Lead-206. Because its half-life is so long it is useful for dating the oldest rocks on Earth, but not very reliable for rocks under 10 million years old.]]> 2018-01-16 17:06:54 UTC https://padlet.com/3039651/usrqjjvr92t6/wish/221790933 3039651 https://padlet.com/3039651/usrqjjvr92t6/wish/221792604 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 17:10:34 UTC https://padlet.com/3039651/usrqjjvr92t6/wish/221792604 3039651 https://padlet.com/3039651/usrqjjvr92t6/wish/221793061 2018-01-16 17:11:28 UTC https://padlet.com/3039651/usrqjjvr92t6/wish/221793061 3039651 https://padlet.com/3039651/usrqjjvr92t6/wish/221828737 Radioactive decay (also known as nuclear decay of radioactivity) 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 18:30:11 UTC https://padlet.com/3039651/usrqjjvr92t6/wish/221828737 3039651 https://padlet.com/3039651/usrqjjvr92t6/wish/221829774 The age of the Earth is approximately 4.54 ± 0.05 billion years (4.54 × 10⁹ years ± 1%). ]]> 2018-01-16 18:32:28 UTC https://padlet.com/3039651/usrqjjvr92t6/wish/221829774