SCIENCEUNIT 6

THE UNIVERSE AND THE SOLAR SYSTEM

• The universe and our solar systemIn the universe there are millions of galaxiesformed of thousands of millions of stars. Planets, satellites and other objects movearound many of these stars forming solar systems.

Our solar system is formed of the Sun and all theplanets, satellites and other objects that movearound it.

ASTEROIDS

COMET

• The Earth and the Moon• The Earth

The Earth is a spherical object that rotates on itsaxis and orbits the Sun. It is formed of threelayers.

* The geosphere

* The hydrosphere

* The atmosphere

• The Moon

The Moon is the Earth´s only satellite. We see itin different lunar phases. It causes eclipses and tides.

Lesson vocabularyTo form: formar

Star: estrellas

To move: mover

Solar system: sistema solar

Earth: Tierra

Moon: luna

Spherical: esferica

To rotate: girar

Axis: eje

Orbit: órbita

Layer: capa

Lunar phases: fases lunares

Eclipses: eclipses

Tides: mareas