# data[].attributes.headline
Truth - The earth is CONSTANTLY CHANGING. 

# data[].attributes.subject
Truth - The earth is CONSTANTLY CHANGING. 

# data[].attributes.body
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 If there was a greater lag time between discoveries, it would be a sign that our methods of research were as outdated and inaccurate as they were when we thought the Earth was flat.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 ...

# data[].attributes.body
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.

# data[].attributes.body
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.

# data[].attributes.body
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.

# data[].attributes.headline
First form of life appeared - Precambrian.

# data[].attributes.subject
First form of life appeared - Precambrian.

# data[].attributes.body
Precambrian time covers the vast bulk of the Earth's history, starting with the planet's creation about 4.5 billion years ago and ending with the emergence of complex, multi celled life-forms almost four billion years later.

# data[].attributes.body
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)

# data[].attributes.headline
Fossil - the preserved remains of an organism. 

# data[].attributes.subject
Fossil - the preserved remains of an organism. 

# data[].attributes.body
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 fossils are impressions or other evidence of an organism preserved in rock.

# data[].attributes.headline
How fossils are formed - living things die and their remains are covered by sediments.

# data[].attributes.subject
How fossils are formed - living things die and their remains are covered by sediments.

# data[].attributes.body
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.

# data[].attributes.headline
Absolute Dating - the age when the rock is formed.

# data[].attributes.subject
Absolute Dating - the age when the rock is formed.

# data[].attributes.body
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.

# data[].attributes.body
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.

# data[].attributes.body
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.

# data[].attributes.headline
Epochs, Periods, Eras, Eons - smallest to greatest time frame.

# data[].attributes.subject
Epochs, Periods, Eras, Eons - smallest to greatest time frame.

# data[].attributes.body
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.

# data[].attributes.body
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.

# data[].attributes.body
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.

# data[].attributes.body
Igneous rock, or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava.

# data[].attributes.body
Sedimentary rocks are types of rock that are formed by the deposition and subsequent cementation of that material at the Earth's surface and within bodies of water

# data[].attributes.body
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.

# data[].attributes.body
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

# data[].attributes.body
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.

# data[].attributes.headline
Cenozoic - the time we are currently in.

# data[].attributes.subject
Cenozoic - the time we are currently in.

# data[].attributes.body
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).

# data[].attributes.headline
Eras - Paleozoic, Cenozoic, and Mesozoic.

# data[].attributes.subject
Eras - Paleozoic, Cenozoic, and Mesozoic.

# data[].attributes.body
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 ...

# data[].attributes.body
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.

# data[].attributes.headline
Sedimentary Rock - fossils forms in this layer.

# data[].attributes.subject
Sedimentary Rock - fossils forms in this layer.

# data[].attributes.body
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.

# data[].attributes.headline
A bug stuck in amber - Preserved Remains

# data[].attributes.subject
A bug stuck in amber - Preserved Remains

# data[].attributes.body
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 Balti camber.

# data[].attributes.attachment_link.title
A bug stuck in amber - Preserved Remains - Google Search

# data[].attributes.headline
How old is the Planet Earth - Paleontologist believe it is 4.6 Billion Years Old

# data[].attributes.subject
How old is the Planet Earth - Paleontologist believe it is 4.6 Billion Years Old

# data[].attributes.body
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.

# data[].attributes.headline
History of rock and fossils - Geologic Time Scale

# data[].attributes.subject
History of rock and fossils - Geologic Time Scale

# data[].attributes.body
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.

# data[].attributes.headline
Relative Dating of rock layers tells us that the deeper we dig - the older the rock gets.

# data[].attributes.subject
Relative Dating of rock layers tells us that the deeper we dig - the older the rock gets.

# data[].attributes.body
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?

# data[].attributes.attachment_link.title
Relative Dating of rock layers tells us that the deeper we dig - the older the rock gets. - Google Search

# data[].attributes.headline
Fossil is an impression left by the original organism - mold 

# data[].attributes.subject
Fossil is an impression left by the original organism - mold 

# data[].attributes.body
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. Both casts and molds are types of fossils. Sometimes the mold and cast are found together, although molds are more than casts.

# data[].attributes.body
A fossil trackway is a type of trace fossil, a trackway made by an organism. Many fossil trackways were made by dinosaurs, early tetrapods, and other quadrupeds and bipeds on land. Marine organisms also made many ancient trackways (such as the trails of trilobites and eurypterids like Hibbertopterus)

# data[].attributes.attachment_link.title
Footprints and Trackways Fossils - Google Search

# data[].attributes.body
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.

# data[].attributes.body
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 ...

# data[].attributes.body
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.

# data[].attributes.body
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