My stellar wall by Joel Rojas https://padlet.com/3050021/t0fupf9a7wbv Made with mirth en-us 2018-01-30 17:32:33 UTC 2018-01-30 17:57:09 UTC hello@padlet.com Principle of uniformitarianism 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226216994 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, and that past ...]]> 2018-01-30 17:33:30 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226216994 Principle of superposition 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226217329 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 17:34:03 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226217329 Mold and Cast fossils 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226217686 Under certain conditions, living things can leave behind impressions of themselves in the form of fossils. Fossils are the remains or impressions of organisms, preserved in petrified molds or casts. They are particularly useful to biologists who can use them to discover extinct animal species, and and study the way that those ...]]> 2018-01-30 17:34:34 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226217686 Petrification Fossils 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226218463 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 17:35:49 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226218463 Footprints and Trackways Fossils 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226218851 Paleontologists can also estimate dinosaur gait and speed from some footprint track ways. If the footprints are close together, this might show they were running. If the footprints are spaced farther apart, the dinosaurs may have been walking. These are just a few of the insights that can be gained from studying trace fossils.]]> 2018-01-30 17:36:24 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226218851 Fossil is an impression left by the original organism - mold 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226219473 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 amold. Both casts and molds are types of fossils. Sometimes the mold and cast are found together, although molds are more than casts.]]> 2018-01-30 17:37:25 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226219473 Relative Dating of rock layers tells us that the deeper we dig - the older the rock gets. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226219891 Relative dating of rock layers tells us that the deeper we dig the younger the rocks get. the smellier the rocks get. the harder the rocks get. the older the rocks get. Question 3. 20 seconds. The Geologic Time Scale is a record of what? old geologists. sweet geology music. the known history ofrocks and fossils.]]> 2018-01-30 17:37:59 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226219891 History of rock and fossils - Geologic Time Scale 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226220570 Scientists who study fossils are called paleontologists. ...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 17:39:04 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226220570 How old is the Planet Earth - Paleontologist believe it is 4.6 Billion Years Old 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226220957 The third approach, and the one that scientists think gives the most accurate age for the Earth, the other planets, and the Solar System, is to determine model lead ages for ... The results from these methods indicate that the Earth, meteorites, the Moon, and, by inference, the entire Solar System are 4.5 to 4.6 billion years old.]]> 2018-01-30 17:39:46 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226220957 A bug stuck in amber - Preserved Remains 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226221402 https://www.forbes.com/sites/.../the-six-most-incredible-fossils-preserved-in-amber
Aug 13, 2015 - And because it is meant to protect a plant from predators, on occasion those organisms get stuck in the resin and frozen for millions of years, preserving fragile ... were able to find and describe some of the earliest preserved remains of a carnivorous plant in approximately 40 million year old Balticamber.
]]> 2018-01-30 17:40:20 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226221402 Sedimentary Rock - fossils forms in this layer. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226221921 With the passage of time and the accumulation of more particles, and often with chemical changes, the sediments at the bottom of the pile become rock.Gravel becomes a rock called conglomerate, sand becomes sandstone, mud becomes mudstone orshale, and the animal skeletons and plant pieces can become fossils]]> 2018-01-30 17:41:02 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226221921 Law of Superposition 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226222335 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 17:41:37 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226222335 Eras - Paleozoic, Cenozoic, and Mesozoic. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226222698 Eras encompass major intervals of Time and are defined based on the fossil life-forms found in the rock layers, and the Law of Superposition. The Hadean, Archean, and Proterozoic Eons do not have recognized Eras. There are three Geologic Eras currently identified. The Paleozoic Era, the Mesozoic Era, and the Cenozoic ...

]]> 2018-01-30 17:42:14 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226222698 Cenozoic - the time we are currently in. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226223109 The Cenozoic is sometimes called the Age of Mammals, because the largest land animals have been mammals during that time. This is a misnomer for several reasons. First, the ... Quaternary (2.6 million years ago to present). Paleogene and Neogene are relatively new terms that now replace the deprecated term, Tertiary.]]> 2018-01-30 17:42:46 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226223109 Petrified fossil. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226223564 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.

]]> 2018-01-30 17:43:29 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226223564 Trace fossils. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226223951 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.]]> 2018-01-30 17:44:11 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226223951 Metamorphic Rock. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226224316 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.]]> 2018-01-30 17:44:47 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226224316 Sedimentary Rock. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226224629 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 17:45:19 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226224629 Igneous Rock. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226225024 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 orvolcanic eruptions, solidifies at a faster rate.

]]> 2018-01-30 17:45:59 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226225024 Cast - is a replica. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226225310 Replica casts are created by molding and then casting an original fossil so all of the detail is preserved, but the original is safely stored in a museum or other responsible collection. ... Sometimes replicas are made by reconstructing partial casts or by paleo-artists who sculpt fossils based on scientific references.

]]> 2018-01-30 17:46:26 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226225310 Superposition. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226225836 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 17:47:21 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226225836 Epochs, Periods, Eras, Eons - smallest to greatest time frame. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226226287 From largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages. ... The time before the Phanerozoic is usually referred to as the Precambrian and is usually divided into the three eons shown. The Phanerozoic is subdivided into three major divisions: the Cenozoic, Mesozoic, and Paleozoic Eras.

]]> 2018-01-30 17:48:02 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226226287 Holocene 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226226810 relating to or denoting the present epoch, which is the second epoch in the Quaternary period and followed the Pleistocene.]]> 2018-01-30 17:48:51 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226226810 Paleontologists - study of fossils. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226227202 Paleontology is the study of the history of life on Earth as based on fossils. Fossils are the remains of plants, animals, fungi, bacteria, and single-celled living things that have been replaced by rock material or impressions of organisms preserved in rock. ... Amber, for instance, is hardened, fossilized tree resin.Apr 29, 2011

]]> 2018-01-30 17:49:25 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226227202 Absolute Dating - the age when the rock is formed. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226227497 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. Radiometric Dating.

]]> 2018-01-30 17:49:54 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226227497 How fossils are formed - living things die and their remains are covered by sediments. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226227824 Fossil. The preserved remains or traces of living things. Sedimentary rock. The type of rock that is made of hardened sediment. Mold. A fossil formed when an ... How do fossils form? Most fossils form when living things die and are buried by sediments. The sediments slowly harden into rock and preserve the shapes of the ...]]> 2018-01-30 17:50:28 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226227824 Fossil - the preserved remains of an organism. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226228962 Most fossils are hardened animal remains such as shells, bones, and teeth. Minerals replace the remains, forming a fossil of the hard skeletal body parts. Other fossilsare impressions or other evidence of an organism preserved in rock.

]]> 2018-01-30 17:52:20 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226228962 This era contains Jurassic - Mesozoic. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226230014 Geologic periods. Following the Paleozoic, the Mesozoic extended roughly 186 million years, from 251.902 to 66 million years ago when the Cenozoic Era began. ...Jurassic (201.3 to 145 million years ago) Cretaceous (145 to 66 million years ago)

]]> 2018-01-30 17:54:02 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226230014 First form of life appeared - Precambrian. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226230309 Life began in the ocean near the beginning of this era. The oldest known fossils - the remains of differenttypes of bacteria - are in archean rocks about 3.5 billion years old. The maps below show the probable locations of Archean (early Precambrian) rocks, which in many cases formed the early continental cratons.

]]> 2018-01-30 17:54:31 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226230309 Mesozoic - when dinosaurs thrived. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226230991 The dinosaurs evolved early in the Mesozoic Era, during the Triassic period (about 228 million years ago). At the start of the Mesozoic Era, the continents of the Earth were jammed together into the supercontinent of Pangaea; this land mass had a hot, dry interior with many deserts.

]]> 2018-01-30 17:55:30 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226230991 Precambrian - the longest of all eras. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226231285 The longest divisions of geologic time are the eras. Most geologic time scales recognize four eras, three of which have been named for the fossils in the associated strata. ... Rocks older than Paleozoic generally lack diagnostic fossils and are widely known as belonging to the Precambrian Era.

]]> 2018-01-30 17:55:55 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226231285 Cenozoic - Age of Mammals 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226231726 The other two are the Mesozoic and Paleozoic Eras. The Cenozoic spans only about 65 million years, from the end of the Cretaceous Period and the extinction of non-avian dinosaurs to the present. The Cenozoic is sometimes called the Age of Mammals, because the largest land animals have been mammals during that time.

]]> 2018-01-30 17:56:23 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226231726 Truth - The earth is CONSTANTLY CHANGING. 3050021 https://padlet.com/3050021/t0fupf9a7wbv/wish/226232073 Science Doesn't Find Truth, It Understands Change ... Yet, our understanding of the world is constantly changing and evolving. ... If there was a greater lag time between discoveries, it would be a sign that our methods of research were as outdated and inaccurate as they were when we thought the Earth was flat. Our culture ...]]> 2018-01-30 17:56:52 UTC https://padlet.com/3050021/t0fupf9a7wbv/wish/226232073