Sunscreen | Understanding and definition of Sunscreen | The use of sunscreen

Sunblock (also commonly known as sun screen, sun lotion, sun cream or block out) is a lotion, spray, gel or other topical product that abso...

Meteorite | Understanding and definition of Meteorite | Collection of space rock | Fragments of Meteorite | The hunters Meteorite

A meteorite is a natural object originating in outer space that survives impact with the Earth's surface. Meteorites can be big or small...

Gallium | Understanding and definition of Gallium | The function and usefulness of Gallium

Gallium is a chemical element that has the symbol Ga and atomic number 31. Elemental gallium does not occur in nature, but as the gallium(II...

Spiral galaxy | Understanding and definition of Spiral galaxy

A spiral galaxy is a certain kind of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae and, as such, for...

Biotechnology | Understanding and definition of Biotechnology

Biotechnology is a field of applied biology that involves the use of living organisms and bioprocesses in engineering, technology, medicine ...

Chemical formula | History and definition Chemical formula

A chemical formula or molecular formula is a way of expressing information about the atoms that constitute a particular chemical compound....

Plate tectonics | Understanding and definition of Plate tectonics

Plate tectonics (from the Late Latin tectonicus, from the Greek: τεκτονικός "pertaining to building") is a scientific theory which...

Volcanology | The history and description of Volcanology

Volcanology (also spelled vulcanology) is the study of volcanoes, lava, magma, and related geological, geophysical and geochemical phenomena...

Volcano | Understanding and definition Vulcano | The number of the active volcanoes in the world

A volcano is an opening, or rupture, in a planet's surface or crust, which allows hot magma, volcanic ash and gases to escape from below...

Geothermal gradient | Understanding and definitions of Geothermal gradient.

Geothermal gradient is the rate of increasing temperature with respect to increasing depth in the Earth's interior. Away from tectonic p...

Earth | Understanding and definition of Earth | Earth in the future

Earth (or the Earth) is the third planet from the Sun and the densest and fifth-largest of the eight planets in the Solar System. It is also...

Joplin, Mo., tornado witness: 'Swath cut through town is huge'

In the moments between the first and second tornado sirens that sounded the warning in Joplin, Mo., on Sunday evening, Sara Ferguson knelt ...

Joplin searches through wreckage

Joplin residents searched through major tornado devastation Monday morning as another brief but severe storm hampered search efforts and re...

Definition of Tornado | Types of Tornado

A tornado is a violent, dangerous, rotating column of air that is in contact with both the surface of the earth and a cumulonimbus cloud or,...

Tornado hits Minneapolis, killing one

MINNEAPOLIS (AP) — At least one person died when a tornado barreled through a residential portion of Minneapolis on Sunday, damaging at lea...

Icelandic volcano flings up ash, shuts airport | Largest volcanic eruption in 100 years

REYKJAVIK, Iceland — A year after an Icelandic volcano grounded planes across Europe, a spectacular new eruption flung up a miles-high ash p...

Geography of Algeria | Climate

Algeria comprises 2,381,741 square kilometers of land, more than four-fifths of which is desert, in northern Africa, between Morocco and Tun...

Kerosene | Dug's Kerosene | Oil

Kerosene, sometimes spelled kerosine in scientific and industrial usage, also known as paraffin in the United Kingdom and South Africa, is a...

Petroleum Exploration

Or search for petroleum exploration is a long study involving several areas of study terrestrial and inexact science. For basic studies, res...

About of Sun or Surya

Sun or Surya is also called (from the name of god "Surya" - the Sun God in Hindu belief) is the closest star to Earth with an aver...