https://padlet.com/304403/dg2yvui11m9a Made with panache en-us 2018-01-16 22:46:12 UTC 2018-01-16 23:07:52 UTC hello@padlet.com https://padletuploads.blob.core.windows.net/prod/215850005/2b24afabe46dfd28e69b075f2cb38084/download.jpeg 304403 https://padlet.com/304403/dg2yvui11m9a/wish/221912177 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 22:54:28 UTC https://padlet.com/304403/dg2yvui11m9a/wish/221912177 304403 https://padlet.com/304403/dg2yvui11m9a/wish/221912707 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 22:59:24 UTC https://padlet.com/304403/dg2yvui11m9a/wish/221912707 304403 https://padlet.com/304403/dg2yvui11m9a/wish/221912954 The continents have since repeatedly collided and been torn apart, so maps of Earth In the distant past are quite different to today's. The history of life on Earth began about 3.8 billion years ago, initially with single-celled prokaryotic cells, such as bacteria.]]> 2018-01-16 23:02:08 UTC https://padlet.com/304403/dg2yvui11m9a/wish/221912954 304403 https://padlet.com/304403/dg2yvui11m9a/wish/221913054 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 23:03:12 UTC https://padlet.com/304403/dg2yvui11m9a/wish/221913054 304403 https://padlet.com/304403/dg2yvui11m9a/wish/221913230 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 23:05:20 UTC https://padlet.com/304403/dg2yvui11m9a/wish/221913230