Defination of lithosphere.

The lithosphere (Greek: λίθος [lithos] for "rocky" + σφαῖρα [sphaira] for "sphere") is the rigid outermost shell of a ro... Read more »

Defination of atmosphere of the Earth.

The atmosphere of Earth is a layer of gases surrounding the planet Earth that is retained by Earth's gravity. The atmosphere protects li... Read more »

Defination of hydrosphere.

A hydrosphere (from Greek ὕδωρ - hydor, "water" and σφαῖρα - sphaira, "sphere") in physical geography describes the comb... Read more »

Defination of biosphere.

The biosphere is the global sum of all ecosystems. It can also be called the zone of life on Earth, a closed (apart from solar and cosmic ra... Read more »

Europe-The fifth largest continent

Europe (pronunciation: /ˈjʊərəp/ yewr-əp or /ˈjɜrəp/ yur-əp) is, by convention, one of the world's seven continents. Comprising the wes... Read more »

South America-The fourth largest continent

South America (Spanish: América del Sur, Sudamérica or Suramérica; Portuguese: América do Sul; Quechua and Aymara: Urin Awya Yala; Guarani:... Read more »

North America-The third largest continent

North America (Spanish: América del Norte or Norteamérica; French: Amérique du Nord; Dutch: Noord-Amerika; Papiamento: Nort Amerika; Kalaal... Read more »

Africa-The second largest continent

Africa is the world's second largest and second most populous continent, after Asia. At about 30.2 million km² (11.7 million sq mi) inc... Read more »

What is a Diatomic molecule?

Diatomic molecules are molecules composed only of two atoms, of either the same or different chemical elements. The prefix di- means two in ... Read more »

Defination of molecule.

A molecule (play /ˈmɒlɪkjuːl/) is an electrically neutral group of two or more atoms held together by covalent chemical bonds. Molecules are... Read more »

Defination of troposphere.

The troposphere is the lowest portion of Earth's atmosphere. It contains approximately 80% of the atmosphere's mass and 99% of its w... Read more »

Defination of stratosphere.

The stratosphere (pronounced /ˈstrætəsfɪər/) is the second major layer of Earth's atmosphere, just above the troposphere, and below the ... Read more »

Defination of thermosphere.

The thermosphere is the biggest of all the layers of the Earth's atmosphere directly above the mesosphere and directly below the exosphe... Read more »

Defination of exosphere.

The exosphere is the uppermost layer of Earth's atmosphere. In the exosphere, an upward travelling molecule moving fast enough to attain... Read more »

Defination of non-metals.

Nonmetal, or non-metal, is a term used in chemistry when classifying the chemical elements. On the basis of their general physical and chemi... Read more »

Defination of metals.

Metals are sometimes described as an arrangement of positive ions surrounded by a sea of delocalized electrons. Metals occupy the bulk of th... Read more »

Asia - The Largest Continent

Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of t... Read more »

What Is Panthalassa?

Panthalassa (Greek Πανθαλασσά, meaning 'all sea'), also known as the Panthalassic Ocean, was the vast global ocean that surrounded t... Read more »

What Is Pangaea?

Pangaea, Pangæa, or Pangea (pronounced /pænˈdʒiːə/ pan-jee-ə,from Ancient Greek πᾶν pan "entire", and Γαῖα Gaia "Earth",... Read more »

What Is A Ocean?

An ocean (from Greek Ὠκεανὸς, "okeanos" Oceanus) is a major body of saline water, and a principal component of the hydrosphere. Ap... Read more »