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Cómo estudiar sus tarjetas
Teclas de Derecha/Izquierda: Navegar entre tarjetas.tecla derechatecla izquierda
Teclas Arriba/Abajo: Colvea la carta entre frente y dorso.tecla abajotecla arriba
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How was the universe 15 billion years ago?
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The universe was nothing more than a small pinpoint of mass.
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What happened about 13.8 billion years ago?
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With a lot of energy and heat the pinpoint exploded creating the universe. We call this the Big Bang.
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When was the Earth we know today formed?
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It was formed 4.5 bllion years ago.
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What is accretion?
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Accretion is the process of dust, debris, rocky particles and gases colliding and forming planets.
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How long does it take for the Earth to revolve around the Sun?
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365 days
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How is the path the Earth takes around the Sun called?
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It is called orbit.
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When the Earth is closest to the Sun, what happens?
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Earth speeds up.
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How is Earth's orbit shaped?
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Earth's orbit is elliptical.
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Why do we have seasons?
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Because of Earth's tilt, which is of 23,5º.
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What happened after the universe was created?
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Everything spun around, creating the Sun.
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