Early formation of the earth
Big bang bang
About 12 billion years ago there was a big explosion in space. The explosion resulted in a very high heat, so that the existing materials terlontardan join into elements of hydrogen and helium, then followed by other elements such as heavier carbon.
When ejected, the materials move away and spin like a disc.
The farther away the elements cool down and start to clot.
The spinning motion resulted in some of the clumps breaking and splitting. Some are missing and some are still following and are in orbit
The clumps that remain together in an orbit form a planet that surrounds the star's core, the sun. These planets also rotate on their own axis so that the surrounding objects are formed objects of space that are attracted by the graffiti. All of the heavenly bodies moving in a similar orbital system are called SOLARS.
More than 4 billion years ago the universe has been composed of a large solar system consisting of stars, planets, gases, and space dust (comets, asteroids, satellites or moons). Each move away from each other. One of these is the solar system of the galaxies.
Precambian / Vendian Period (4.5 billion Years Ago)
Earth formed 4.5 billion and began to cool 3.5 billion years ago. The steam begins to clot into water that fills the hot basin and eventually becomes the ocean. Early life began to form from chemical molecules carried by falling comets / meteors and from rocks dissolved by water. The molecules combine with the energy of lightning and sunlight. The earliest living things consist of a single cell that can reproduce itself like a virus and produce oxygen. Next bekembang become soft-bodied creatures such as the type of ancient worms, jellyfish and mud layers of plants / stromatolites.
The Cambrian Period (590 500 Million last year)590 million years ago there was a repeated collision between the earth's crust finally produced the first continent of the continent of gondwana. The climate is cold and cold. Occurs volcanism is primarily ocean. There is no livelihood but many inhabited by flaura and fauna., There are shelled creatures of sea, including various types of snails, oysters, anemones, algae corals, primitive fish and various types of crustaceans including trilobite and graptolite.
Ordovician period (500-440 million years ago)
The lands that form the continents of gondwana, laurensia and baltica continue to move slowly. Invertebrate animals began to appear including various types of marine mollusks, marine roots, sea urchins and shelled squid. Mount-formed, sea and land boundaries change, many formed clay (silt). Trilobites are still very numerous, but coral reefs, marine mollusks, sea lotus (crinoids) and some kind of root of the bahar start to emerge. The bare shielded fish that were the first animals to fight back began to appear. Ends with the Ice Age.
Silurian Period (440 410 Million last year)
The Ice Age is over. Continent laurensia began to clash with baltica, happened subducting continental plates. Appeared ground plants such as grass seeds that grow on the surface of water, the earliest terrestrial animal in the form of a type of worm and then evolved into insects at the end of this period.
The Devonian Period (410 360 Million last year)
The clash of the continent forms a mountain. There was a very strong erosion. Stone slate and sandstone and sandstone are formed. The land began to grow many cycads and ferns. Also known as the age of fish because fish type fish growing in sea water or in fresh water. There are jawless fish, jaw shields, ancient sharks and bony fish. Some fish begin to rise and live on land with insects. It is these bony fish that later develop into early amphibians ichthyostega.
The Carboniferous Period (360-290 Million last year)
The continents collided and joined the great Pangea continent. The surface of the seas rises repeatedly in the forests that later become coal or peat. Large amphibian and shark animals are still dominant. At the end of the period there are reptiles and winged insects including cockroaches and dragonflies. Trilobites are almost extinct, on the other hand coral sea lotus (crinoids) and a wide variety of mollusks. Warm and humid climate triggers the growth of dense forest swamps that will become a coal mine today. Plants that dominate, among others, ferns and horsetail (orchid soil). Animal amphibians are widespread and evolve into reptiles, the first vertebrate animals living on land. In addition, winged insects, among others, dragonfly began to appear.
Permian Period (290 250 Million last year)
The land began to merge into one large continent pangea, in the north of America formed the continents of appalachians, Occurrence of Ice Age, dry climate and formed vast deserts. Animal amphbia evolved into a large reptilian mammal shift form. Many types of marine animals such as extinct trilobites Mainland combinations resulted in massive extinctions. Trilobites of corals and large fish many disappeared at the end of the paleozoic eraThe Triassic Period (250 210 Million last year)
The beginning of the mezoic era is marked by the reappearance of the great continent of the gondwana, when the pangea is split into the continent of laurasia diutara and the continent of gondwana. The great continent of pangea is surrounded by an ancient sea of ??panthalassa. Life in this era has changed considerably. Tanamana leafy, cycads, cypress and ginkgo are the most numerous plants. Mammalian animals evolve with mouse-like shapes, turtles, mammals and meat-eating dinosaurs begin to appear.
Jurassic Period (210 140 Million last year)
When the great continent of the gondwana is slowly split, the northern Atlantic widened and the southern Atlantic began to form. Large dinosaurs ruled the land and the oceans. Like Ichtyosaurus and plasiosaurus. Types of marine and lobster began to evolve. Shell coil or ammonite also a lot of sea. The first primitive bird to emerge is archaoptyrex. The earliest birds emerge from the climber's reptile. Coral reefs began to form a lot of shallow sea.
Cretaceous Period (140 65 Million last year)
Hard-hued plants began to appear. At sea, the bony fish is more diverse. The dominance of dinosaurs peaked, but they became extinct at the end of this period. Conversely, placental mammals (plasental) begin to appear.
Tertiary Period (65 1.7 Million last year)
The continents are beginning to look like they are now but India has not yet joined Asia. Mammals that can run are growing. Grass-eating mammals emerged after various types of grasses grew widely in the middle of this period. Followed by the presence of large animals eating meat.
The Quaternary Age (1.7 Million years ago Now)
Configure the continent as it is now. Initially large animals include various types of tigers, rhinos, monkeys, elephants, stegodons, dominant mammoths. Early humans began to emerge about 1.8 million years ago and were replaced by modern humans some 150,000 years ago.
Earth right nowCurrently our earth is becoming less friendly. We often complain that during the day the sun is so hot while the night was so cold. It's not wrong to feel that way. Because the data show that the earth has experienced an alarming temperature increase every year.
This causes the ozone layer to thicken and UV light from the sun is not much filtered again. The icebergs in the north and south poles are gradually melting, causing many of the more prevalent natural disasters today.
What causes all this? Why is ozone layer thinning? This is what we usually call Global Warming or global warming. Global warming is basically a phenomenon of increasing global temperature from year to year due to the greenhouse effect caused by increasing emissions of gases such as carbon dioxide (CO2), methane (CH4), dinitrooksida (N2O) and CFC so that solar energy trapped in the earth's atmosphere.
Reversal of the development of the earth
The earth is formed for more than 4.5 billion years and each stage of its formation leaves different layers of the earth. Each layer contains the remains of life at a certain time. Based on the fossil remains that have been petrified that the state of the environment on the earth from stage to stage. The fossils that characterize certain stages of the earth's cracking are called fossil scavengers.
from: in the museum sangiran