The imaginary line round which a body (e.g. a planet) rotates.

A large grouping of stars and their planets

Our galaxy, the one which contains the Sun, Earth, etc.

The elliptical path of a smaller celestial body around a larger one.

A celestial body orbiting a star

A huge ball of very hot burning gas, such as the Sun.

The Sun and the celestial bodies that orbit it, planets and their satellites.

The process of making maps

A location and navigation system based on satellite information.

A flat representation of the Earth’s surface

What does the picture represents?

The relationship between the real size of a particular area of the Earth and its size on a map.

Numbers used to give the exact location of a persona or place on the Earth.

An imaginary line that divides the Earth’s surface from pole to pole.

The meridian, at 0º longitude, that is the reference point for all other meridians. It divides the Earth into the Western and Eastern Hemispheres.

The distance between a place on the Earth’s surface and the Greenwich or Prime Meridian.

An imaginary line that encircles the Earth horizontally.

The imaginary line that encircles the Earth horizontally and divides it into the Northen and Southern Hemispheres. It is the parallel at 0º latitude.

The distance between a place on the Earth’s surface and the Equator.

One of two equal halves of a planet

Ecological system in which life exists

The layer of gases that surrounds the Earth.

The water that exists in our planet: oceans, seas, rivers, lakes. Ices, ground water and water vapour.

The Earth’s solid outer layer. It consists of the continents and submerged land under the oceans and seas.

Name of the year when we add extra day to the month of February.

Sun’s rays are vertical at one of the tropics. Days are long and warm in one hemisphere but sold and cold in the other.

Sun’s rays are vertical at the equator. Both hemispheres received the same amount of sunlight.