Las gotas de agua condensadas en las nubes adquieren un peso y un tamaño tal que comienzan a descender hacia la superficie terrestre en forma de lluvia
El carbono presente en las rocas carbonatadas se libera cuando estas rocas se mueven
Es el proceso mediante el cual algunos organismos (bacterias desnitrificantes) descomponen los iones nitrato y nitrito, liberando nitrógeno gaseoso al medio
Ocurre cuando el sol calienta la superficie de ríos, lagos, mares y océanos, cuando transpiran las plantas y cuando sudan los animales.
El agua que cae al suelo a través de las precipitaciones penetra en la superficie terrestre y circula como agua subterránea.
El oxígeno que se encuentra en la atmósfera, hidrósfera y litósfera se puede combinar con minerales y con elementos y compuestos químicos para formar compuestos oxidados que se descomponen y liberan el oxígeno.
Los animales utilizan el oxígeno liberado a la atmósfera para realizar la respiración, y en este proceso liberan dióxido de carbono y vapor de agua a la atmósfera, que son compuestos que también contienen oxígeno.
Es el proceso mediante el cual el amoníaco (NH3) o el ion amonio (NH4+) se transforman en iones nitritos (NO2–) o nitratos (NO3–)
proceso de circulación del carbono en el planeta Tierra.
Verticales
El agua en estado gaseoso pasa a estado líquido cuando disminuye la temperatura, y se forman las nubes y la niebla.
Las plantas, algas y el fitoplancton realizan fotosíntesis, que es un proceso mediante el cual utilizan dióxido de carbono, agua y luz solar para obtener energía y sintetizar sus nutrientes.
El carbono sedimenta y forma fósiles y combustibles fósiles
Cuando un organismo muere, se descompone por la acción de ciertos microorganismos que utilizan oxígeno para realizar su descomposición y a su vez, liberan dióxido de carbono
Es el proceso mediante el cual los organismos vivos utilizan el nitrógeno en su metabolismo
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This will get all the words on the grid about 90% of the time, depending on the word list. For the other 10%, you will get an alert explaining that the words that did not fit were added to the scratchpad.
It prints on two pages.
Big puzzles won’t always print on one page — the clues and grid are the smallest we could make them while keeping them readable for everyone.
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