Team Olimpiade Astronomi dan Fisika Kab. Ciamis

Seperti halnya crop circle, ice circle merupakan fenomena aneh yang menyebabkan terbentuknya pola lingkaran aneh di permukaan air.

Ice circle bisa terjadi dimana saja, jadi jika anda melihat pola lingkaran dipermukaan sungai atau danau, mungkin saja itu adalah ice circle yang baru terbentuk.

Ice Circle atau lingkaran es adalah sebuah fenomena yang muncul pada air yang memiliki arus lambat di iklim dingin. Bentuknya menyerupai piringan raksasa yang terdiri dari es dan berotasi secara lambat di permukaan air. Misteri ini sesungguhnya sudah pernah disinggung pada abad ke-19. Sebuah gambar ilustrasi dari Ice Circle pernah dipublikasikan di majalah Scientific American pada tahun 1895. London News juga pernah melaporkan fenomena ini yang terjadi di Toronto tahun 1930.

Ice Circle umumnya muncul pada kelokan sungai dimana arus air yang berakselerasi menciptakan sebuah kekuatan yang disebut "rotational shear", yang kemudian mematahkan bongkahan es dan memutarnya. Sejalan dengan perputaran piringan itu, ia menggiling es di sekelilingnya sehingga menjadi halus dan membentuk lingkaran sempurna. Fenomena ini walaupun sudah teridentifikasi penyebabnya, namun tetap merupakan kejadian yang langka.

Fenomena unik ini sering terlihat didaerah uk. Roy Jefferies, ketika sedang membawa anjingnya jalan di pinggiran sungai dia melihat terbentuknya pola lingkaran unik ini. Menurut dia diameter ice circle ini sekitar 10 kaki.

Science (from the Latin scientia, meaning "knowledge") is "any system of knowledge that is concerned with the physical world and its phenomena and that entails unbiased observations and systematic experimentation"^[1]. It builds and organizes knowledge in the form of testable explanations and predictions about the world.^[2]^[3]^[4]^[5] An older meaning still in use today is that of Aristotle, for whom scientific knowledge was a body of reliable knowledge that can be logically and rationally explained (see "History and etymology" section below).^[6]

Since classical antiquity science as a type of knowledge was closely linked to philosophy. In early modern times the two words, "science" and "philosophy", were sometimes used interchangeably in the English language. By the 17th century, "natural philosophy" (which is today called "natural science") could be considered separately from "philosophy" in general.^[7] However, "science" continued to be used in a broad sense denoting reliable knowledge about a topic, in the same way it is still used in modern terms such as library science or political science.

Science is "[i]n modern use, often treated as synonymous with ‘Natural and Physical Science’, and thus restricted to those branches of study that relate to the phenomena of the material universe and their laws, sometimes with implied exclusion of pure mathematics. This is now the dominant sense in ordinary use^[8]." This narrower sense of "science" developed as a part of science became a distinct enterprise of defining "laws of nature", based on early examples such as Kepler's laws, Galileo's laws, and Newton's laws of motion. In this period it became more common to refer to natural philosophy as "natural science". Over the course of the 19th century, the word "science" became increasingly associated with the disciplined study of the natural world including physics, chemistry, geology and biology.

This sometimes left the study of human thought and society in a linguistic limbo, which was resolved by classifying these areas of academic study as social science. Similarly, several other major areas of disciplined study and knowledge exist today under the general rubric of "science", such as formal science andapplied science.^[9]

Natural sciences

Astronomy
Astrophysics · Cosmology
Galactic astronomy · Planetary geology
Planetary science · Stellar astronomy

Biology
Anatomy · Astrobiology · Biochemistry
Biogeography · Biological engineering ·Biophysics
Behavioral neuroscience ·Biotechnology
Botany · Cell biology · Cryobiology
Developmental biology
Ecology · Ethnobiology
Evolutionary biology (introduction)
Genetics (introduction)
Gerontology · Immunology · Limnology
Marine biology · Microbiology
Molecular biology · Neuroscience
Paleontology · Parasitology · Physiology
Radiobiology · Soil biology
Theoretical biology · Toxicology ·Zoology