https://padlet.com/3049201/9d4k90quytir Period 2 en-us 2018-01-30 17:25:20 UTC 2018-01-31 17:45:13 UTC hello@padlet.com 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226214031 Uniformitarianism is defined in the authoritative Glossary of Geology as "the fundamental principle or doctrine that geologic processes and natural laws now operating to modify the Earth's crust have acted in the same regular manner and with essentially the same intensity throughout geologic time]]> 2018-01-30 17:28:23 UTC https://padlet.com/3049201/9d4k90quytir/wish/226214031 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226214671 In physics and systems theory, the superposition principle, also known as superposition property, states that, for all linear systems, the net response caused by two or more stimuli is the sum of the responses that would have been caused by each stimulus individually.]]> 2018-01-30 17:29:28 UTC https://padlet.com/3049201/9d4k90quytir/wish/226214671 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226215477 Organisms buried in sediment may decay or dissolve away leaving a cavity or mold. If the space is subsequently filled with sediment, an external cast can be made.Molds and casts are three dimensional and preserve the surface contours of the organism.]]> 2018-01-30 17:30:52 UTC https://padlet.com/3049201/9d4k90quytir/wish/226215477 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226216110 Petrified wood is the name given to a special type of fossilized remains of terrestrial vegetation. It is the result of a tree or tree-like plants having completely transitioned to stone by the process of permineralization.]]> 2018-01-30 17:31:59 UTC https://padlet.com/3049201/9d4k90quytir/wish/226216110 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226217485 A fossil consisting of an imprint of or a mark left by an organism, as opposed to physical remains. Trace fossils are produced in soft sediments and include surface tracks, molded impressions left by organisms or tissues that later decayed, and subsurface burrows or tunnelings.]]> 2018-01-30 17:34:17 UTC https://padlet.com/3049201/9d4k90quytir/wish/226217485 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226221782 A mold is the impression and void (space, hole) that an organism or organism's body or body part leaves in the sediment. ... A cast is made of different material than a mold. ]]> 2018-01-30 17:40:51 UTC https://padlet.com/3049201/9d4k90quytir/wish/226221782 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226222473 These rock layers formed from sediments deposited in a lake. ... In the same way, geologists figure out the relative ages of fossils and sedimentary rock layers; rock layers, and the fossils they contain, toward the bottom of a stack of sediments are older than those found higher in the stack.]]> 2018-01-30 17:41:52 UTC https://padlet.com/3049201/9d4k90quytir/wish/226222473 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226223775 Fossils are fundamental to the geologic time scale. ... Rocks formed during the Phanerozoic Eon may have fossils of complex animals and plants such as dinosaurs, mammals, and trees. We study Earth's history by studying the record of past events that is preserved in the rocks.]]> 2018-01-30 17:43:53 UTC https://padlet.com/3049201/9d4k90quytir/wish/226223775 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226225561 Earth is 4.54 billion years old, with an error range of 50 million years.]]> 2018-01-30 17:46:52 UTC https://padlet.com/3049201/9d4k90quytir/wish/226225561 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226227088 mber is sticky, like honey or glue. The insects land on tree sap either intentionally or by accident, and can't exert enough force to remove themselves from it. The tree sap continues to flow and coats the insect. The sap hardens into amber, preserving the now dead insect forever.]]> 2018-01-30 17:49:14 UTC https://padlet.com/3049201/9d4k90quytir/wish/226227088 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226228189 Rock that has formed through the deposition and solidification of sediment, especially sediment transported by water (rivers, lakes, and oceans), ice ( glaciers ), and wind. Sedimentary rocks are often deposited in layers, and frequently contain fossils. Note :Limestone and shale are common sedimentary rocks.]]> 2018-01-30 17:51:02 UTC https://padlet.com/3049201/9d4k90quytir/wish/226228189 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226229539 law of superposition. noun. Geology. a basic law of geochronology, stating that in any undisturbed sequence of rocks deposited in layers, the youngest layer is on top and the oldest on bottom, each layer being younger than the one beneath it and older than the one above it.

]]> 2018-01-30 17:53:17 UTC https://padlet.com/3049201/9d4k90quytir/wish/226229539 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226234384 a proposed amendment to the US Constitution stating that civil rights may not be denied on the basis of one's sex.]]> 2018-01-30 18:00:16 UTC https://padlet.com/3049201/9d4k90quytir/wish/226234384 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226236780 The Cenozoic Era is the current geological era, covering the period from 66 million years ago to the present day. The Cenozoic is also known as the Age of Mammals, because of the large mammals that dominate it.]]> 2018-01-30 18:04:00 UTC https://padlet.com/3049201/9d4k90quytir/wish/226236780 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226678586 Petrified fossils form when minerals replace all or part of an organism. Water is full of dissolved minerals. It seeps through the layers of sediment to reach the dead organism. When the water evaporates, only the hardened minerals are left behind.]]> 2018-01-31 17:09:20 UTC https://padlet.com/3049201/9d4k90quytir/wish/226678586 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226679446 A trace fossil, also ichnofossil, is a geological record of biological activity. Trace fossils may consist of impressions made on the substrate by an organism: for example, burrows, borings, urolites, footprints and feeding marks, and root cavities.]]> 2018-01-31 17:10:32 UTC https://padlet.com/3049201/9d4k90quytir/wish/226679446 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226680105 Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". The original rock is subjected to heat and pressure, causing profound physical or chemical change.]]> 2018-01-31 17:11:36 UTC https://padlet.com/3049201/9d4k90quytir/wish/226680105 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226689381 Rock that has formed through the deposition and solidification of sediment, especially sediment transported by water (rivers, lakes, and oceans), ice ( glaciers ), and wind. Sedimentary rocks are often deposited in layers, and frequently contain fossils. Note :Limestone and shale are common sedimentary rocks.

]]> 2018-01-31 17:26:31 UTC https://padlet.com/3049201/9d4k90quytir/wish/226689381 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226690713 Extrusive igneous rocks cool and solidify quicker than intrusive igneous rocks. They are formed by the cooling of molten magma on the earth's surface. The magma, which is brought to the surface through fissures oror volcanic eruptions, solidifies at a faster rate.]]> 2018-01-31 17:28:28 UTC https://padlet.com/3049201/9d4k90quytir/wish/226690713 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226692572 Throw (something) forcefully in a specified direction.]]> 2018-01-31 17:31:29 UTC https://padlet.com/3049201/9d4k90quytir/wish/226692572 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226694173 In physics and systems theory, the superposition principle, also known as superposition property, states that, for all linear systems, the net response caused by two or more stimuli is the sum of the responses that would have been caused by each stimulus individually.]]> 2018-01-31 17:33:59 UTC https://padlet.com/3049201/9d4k90quytir/wish/226694173 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226694804 The largest defined unit of time is the supereon, composed of eons.Eons are divided into eras, which are in turn divided into periods,epochs and ages. The terms eonothem, erathem, system, series, and stage are used to refer to the layers of rock that correspond to these periods of geologic time.]]> 2018-01-31 17:34:59 UTC https://padlet.com/3049201/9d4k90quytir/wish/226694804 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226695543 The Holocene is the current geological epoch. It began after the Pleistocene, approximately 11,700 years before present. The Holocene is part of the Quaternary period. ]]> 2018-01-31 17:36:05 UTC https://padlet.com/3049201/9d4k90quytir/wish/226695543 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226695972 Paleontology or palaeontology is the scientific study of life that existed prior to, and sometimes including, the start of the Holocene Epoch.]]> 2018-01-31 17:36:45 UTC https://padlet.com/3049201/9d4k90quytir/wish/226695972 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226698121 Absolute dating is the process of determining an age on a specified chronology in archaeology and geology. Some scientists prefer the terms chronometric or calendar dating, as use of the word "absolute" implies an unwarranted certainty of accuracy.]]> 2018-01-31 17:39:55 UTC https://padlet.com/3049201/9d4k90quytir/wish/226698121 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226698652 Fossils are formed in a number of different ways, but most are formed when a plant or animal dies in a watery environment and is buried in mud and silt. Soft tissues quickly decompose leaving the hard bones or shells behind. Over time sediment builds over the top and hardens into rock.]]> 2018-01-31 17:40:40 UTC https://padlet.com/3049201/9d4k90quytir/wish/226698652 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226699186 Fossil Group, Inc. is an American fashion designer and manufacturer founded in 1984 by Tom Kartsotis and based in Richardson, Texas. Their brands include Fossil, Relic, Abacus, Michele Watch, Skagen Denmark, Misfit, WSI, and Zodiac Watches.]]> 2018-01-31 17:41:26 UTC https://padlet.com/3049201/9d4k90quytir/wish/226699186 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226700238 The Mesozoic Era is an interval of geological time from about 252 to 66 million years ago. It is also called the Age of Reptiles, a phrase introduced by the 19th century paleontologist Gideon Mantell .]]> 2018-01-31 17:43:06 UTC https://padlet.com/3049201/9d4k90quytir/wish/226700238 3049201 https://padlet.com/3049201/9d4k90quytir/wish/226701322 2018-01-31 17:44:48 UTC https://padlet.com/3049201/9d4k90quytir/wish/226701322