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Java Games: Flashcards, matching, concentration, and word search. |
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"Origin of the Atmosphere" Mrs. Davis!!
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| Hydrogen and Helium | ______ and _____ probably dominated the Earth's earliest atmosphere. |
| Percambrian | In the _________ time period (2500 million years ago), there was considerable volcanic activity. |
| outgassing | Volcanoes not only spew lave but they also, through ___________, vent water vapor (H2O), carbon dioxide (CO2), nitrogen (n2), and carbon monoxide(CO). |
| volcanos | In addition to the gases ejected from |
| O2 | Oxygen |
| CO2 | Carbon Dioxide |
| N2 | Nitrogen |
| photosynthesis | the process a plant uses to turn sunlight into energy |
| cynobacteria | consume carbon dioxide to create oxygen |
| The earth contains mostly _____. | nitrogen |
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Teacher |
Brookville High School |
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