https://padlet.com/3039411/i7xgmw71j4zq en-us 2018-01-23 16:30:38 UTC 2025-06-14 13:44:07 UTC hello@padlet.com 3039411 https://padlet.com/3039411/i7xgmw71j4zq/wish/223864003 The geologic time scale is a system of chronological dating that relates geological strata to time. ]]> 2018-01-23 16:31:24 UTC https://padlet.com/3039411/i7xgmw71j4zq/wish/223864003 3039411 https://padlet.com/3039411/i7xgmw71j4zq/wish/223864126 The sub-discipline of geology that involves study of rock strata is called stratigraphy. Layering of rocks or sediment is also called stratification.]]> 2018-01-23 16:31:35 UTC https://padlet.com/3039411/i7xgmw71j4zq/wish/223864126 3039411 https://padlet.com/3039411/i7xgmw71j4zq/wish/223866594 The Rock Cycle is a group of changes. Rocks are the most common material on Earth. They are naturally occurring aggregates of one or more minerals.]]> 2018-01-23 16:35:09 UTC https://padlet.com/3039411/i7xgmw71j4zq/wish/223866594 3039411 https://padlet.com/3039411/i7xgmw71j4zq/wish/223866650 A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age.]]> 2018-01-23 16:35:14 UTC https://padlet.com/3039411/i7xgmw71j4zq/wish/223866650 3039411 https://padlet.com/3039411/i7xgmw71j4zq/wish/223868297 Half-Life is a series of first-person shooter games developed and published by Valve. The major installments feature protagonist Gordon Freeman.]]> 2018-01-23 16:37:33 UTC https://padlet.com/3039411/i7xgmw71j4zq/wish/223868297 3039411 https://padlet.com/3039411/i7xgmw71j4zq/wish/223868362 It is a method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.]]> 2018-01-23 16:37:39 UTC https://padlet.com/3039411/i7xgmw71j4zq/wish/223868362 3039411 https://padlet.com/3039411/i7xgmw71j4zq/wish/223870048 It is a technique for determining the age of organic materials, such as wood, based on their content of the radioisotope]]> 2018-01-23 16:40:08 UTC https://padlet.com/3039411/i7xgmw71j4zq/wish/223870048 3039411 https://padlet.com/3039411/i7xgmw71j4zq/wish/223872455  The spontaneous transformation of an unstable atomic nucleus into a lighter.]]> 2018-01-23 16:43:42 UTC https://padlet.com/3039411/i7xgmw71j4zq/wish/223872455