“Earth”

A period of time akin to the time taken for the Earth to undergo a full cycle of seasons.

The subjective human experience, regarded collectively; human collective existence; existence in general; the reality we live in.

The substance constituting Earth's atmosphere: a gaseous mixture of nitrogen, oxygen, and various trace gases.

The direction towards the pole to the left-hand side of someone facing east, specifically 0°, or (on another celestial object) the direction towards the pole lying on the northern side of the invariable plane.

A (usually self-sustaining) chemical reaction involving the bonding of oxygen with carbon or other fuel, with the production of heat and the presence of flame or smouldering.

The direction opposite to that of the earth's rotation, specifically 270°.

One of four seasons, traditionally the second, marked by the longest and typically hottest days of the year due to the inclination of the Earth and thermal lag. Typically regarded as spanning either the period between the summer solstice to the autumnal equinox, or the months of June, July, and August in the Northern Hemisphere and the months of December, January and February in the Southern Hemisphere.

The part of Earth which is not covered by oceans or other bodies of water.