Earth

terrestrialworldGlobalthe EarthPlanet EarthTerragroundlandEarth's surfaceglobe
Earth is the third planet from the Sun and the only astronomical object known to harbor life.wikipedia
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Moon

lunarthe MoonLuna
Earth's gravity interacts with other objects in space, especially the Sun and the Moon, Earth's only natural satellite.
The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent natural satellite.

Sun

solarSolThe Sun
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
It is by far the most important source of energy for life on Earth.

Earth's rotation

rotationrotation of the EarthEarth rotates
During this time, Earth rotates about its axis about 366.26 times.
Earth's rotation is the rotation of Planet Earth around its own axis.

Year

myaMamillion years ago
Earth revolves around the Sun in 365.26 days, a period known as an Earth year.
A year is the orbital period of the Earth moving in its orbit around the Sun.

Land

landsState Minister for Landsland mass
The remaining 29% is land consisting of continents and islands that together have many lakes, rivers and other sources of water that contribute to the hydrosphere.
Land, sometimes referred to as dry land, is the solid surface of Earth that is not permanently covered by water.

Plate tectonics

tectonic platetectonic platesplate tectonic
Earth's lithosphere is divided into several rigid tectonic plates that migrate across the surface over periods of many millions of years.
Plate tectonics (from the Late Latin tectonicus, from the τεκτονικός "pertaining to building") is a scientific theory describing the large-scale motion of seven large plates and the movements of a larger number of smaller plates of the Earth's lithosphere, since tectonic processes began on Earth between 3 and 3.5 billion years ago.

Season

seasonsseasonalfour seasons
Earth's axis of rotation is tilted with respect to its orbital plane, producing seasons on Earth.
On Earth, seasons result from Earth's orbit around the Sun and Earth's axial tilt relative to the ecliptic plane.

Earth's orbit

its orbitorbitEarth orbits
Earth revolves around the Sun in 365.26 days, a period known as an Earth year.
All astronomical objects in the Solar System, including the planets like Earth, orbit around the Solar System's centre of mass.

History of Earth

Earth's historyhistory of the EarthEarth history
Within the first billion years of Earth's history, life appeared in the oceans and began to affect the Earth's atmosphere and surface, leading to the proliferation of aerobic and anaerobic organisms.
The history of Earth concerns the development of planet Earth from its formation to the present day.

Tide

tidallow tidehigh tide
The gravitational interaction between Earth and the Moon causes ocean tides, stabilizes Earth's orientation on its axis, and gradually slows its rotation.
Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth.

Atmosphere of Earth

airatmosphereEarth's atmosphere
Within the first billion years of Earth's history, life appeared in the oceans and began to affect the Earth's atmosphere and surface, leading to the proliferation of aerobic and anaerobic organisms.
The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity.

Gravity

gravitationgravitationalgravitational force
The gravitational interaction between Earth and the Moon causes ocean tides, stabilizes Earth's orientation on its axis, and gradually slows its rotation.
On Earth, gravity gives weight to physical objects, and the Moon's gravity causes the ocean tides.

Extinction event

mass extinctionmass extinctionsextinction events
In the history of the Earth, biodiversity has gone through long periods of expansion, occasionally punctuated by mass extinction events.
An extinction event (also known as a mass extinction or biotic crisis) is a widespread and rapid decrease in the biodiversity on Earth.

Gravity of Earth

ggravityEarth's gravity
Earth's gravity interacts with other objects in space, especially the Sun and the Moon, Earth's only natural satellite.
The gravity of Earth, denoted by, is the net acceleration that is imparted to objects due to the combined effect of gravitation (from distribution of mass within Earth) and the centrifugal force (from the Earth's rotation).

Planet

planetsFormer classification of planetsplanetary-mass object
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
The planets were thought by Ptolemy to orbit Earth in deferent and epicycle motions.

Water distribution on Earth

about 97.2 percent of its known watercovered with waterEarth's water
About 71% of Earth's surface is covered with water, mostly by oceans.
Because the oceans that cover roughly 78% of the area of the Earth reflect blue light, the Earth appears blue from space, and is often referred to as the blue planet and the Pale Blue Dot.

Solar System

outer Solar Systeminner Solar SystemSol system
Earth is the densest planet in the Solar System and the largest of the four terrestrial planets.
The four smaller inner planets, Mercury, Venus, Earth and Mars, are terrestrial planets, being primarily composed of rock and metal.

Biodiversity

diversitybiological diversitybiodiverse
In the history of the Earth, biodiversity has gone through long periods of expansion, occasionally punctuated by mass extinction events.
Biodiversity is not distributed evenly on Earth, and is richest in the tropics.

Soil

dirtsoilssoil moisture
The modern English word Earth developed from a wide variety of Middle English forms, which derived from an Old English noun most often spelled . It has cognates in every Germanic language, and their proto-Germanic root has been reconstructed as *erþō. In its earliest appearances, eorðe was already being used to translate the many senses of Latin and Greek (gē): the ground, its soil, dry land, the human world, the surface of the world (including the sea), and the globe itself.
Earth's body of soil is the pedosphere, which has four important functions: it is a medium for plant growth; it is a means of water storage, supply and purification; it is a modifier of Earth's atmosphere; it is a habitat for organisms; all of which, in turn, modify the soil.

Biosphere

ecospherebiosphericenvironment
Over 7.6 billion humans live on Earth and depend on its biosphere and natural resources for their survival.
It can also be termed the zone of life on Earth, a closed system (apart from solar and cosmic radiation and heat from the interior

Antarctic ice sheet

AntarcticAntarcticaAntarctic ice cap
The majority of Earth's polar regions are covered in ice, including the Antarctic ice sheet and the sea ice of the Arctic ice pack.
The Antarctic ice sheet is one of the two polar ice caps of the Earth.

Lithosphere

continental lithosphereoceaniclithospheric
Earth's lithosphere is divided into several rigid tectonic plates that migrate across the surface over periods of many millions of years.
On Earth, it is composed of the crust and the portion of the upper mantle that behaves elastically on time scales of thousands of years or greater.

Gaia

GaeaEarthGe
As with Terra and Gaia, Earth was a personified goddess in Germanic paganism: the Angles were listed by Tacitus as among the devotees of Nerthus, and later Norse mythology included Jörð, a giantess often given as the mother of Thor.
In Greek mythology, Gaia ( or ; from Ancient Greek Γαῖα, a poetical form of Γῆ Gē, "land" or "earth"), also spelled Gaea, is the personification of the Earth and one of the Greek primordial deities.

Earth goddess

Mother Earthearthearth-goddess
As with Terra and Gaia, Earth was a personified goddess in Germanic paganism: the Angles were listed by Tacitus as among the devotees of Nerthus, and later Norse mythology included Jörð, a giantess often given as the mother of Thor.
An Earth goddess is a deification of the Earth.

Terrestrial planet

terrestrial planetsrockyrocky planet
Earth is the densest planet in the Solar System and the largest of the four terrestrial planets.
Within the Solar System, the terrestrial planets are the inner planets closest to the Sun, i.e. Mercury, Venus, Earth, and Mars.