Title |
Comment |
Keywords |
Algae Add Oxygen to the Atmosphere
|
18:44 - 19:17 (00:33) / 0.6 MB
|
"James Sadd", atmosphere, life, oxygen, water, algae
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An Oxygen Rich Atmosphere
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19:17 - 19:54 (00:37) / 1.3 MB
|
"blue-green algae", cyanobacteria, oxygen, atmosphere
|
A Calendar Year
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02:51 - 03:54 (01:03) / 1.2 MB
|
"James Sadd", "geologic time", "geologic age", planet, water, life, oxygen, gas, atmosphere, "multi-cellular organism", plant, animal, dinosaur, extinction, humans, "Industrial Revolution"
|
Stromatolites
|
03:55 - 04:59 (01:04) / 1.4 MB
|
fossil, "marine organism", bone, shell, stromatolite, algae, oxygen, atmosphere, evolution, "sedimentary rock"
|
First Appearance of Hard Shelled Organisms
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08:59 - 10:00 (01:01) / 0.9 MB
|
"Dee Trent", "hard part", Cambrian, Precambrian, mutation, oxygen, evolution, jellyfish, earthworm, atmosphere
|
Life on Land
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10:50 - 12:11 (01:21) / 1.4 MB
|
"Dee Trent", life, atmosphere, oxygen, photosynthesis, stromatolite, algae, ozone, "carbon dioxide", "solar radiation", Precambrian, Paleozoic, limestone, ocean, horse, camel, humans, sycamore, "carbon cycle"
|
Quartz
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08:34 - 09:20 (00:46) / 0.7 MB
|
"Richard Hazlett", mineral, quartz, silicon, oxygen, solid, gas, hardness, "three-dimensional bonding", ion, transparent, crystal, element
|
Crystallization In Water
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22:58 - 23:43 (00:45) / 1.2 MB
|
crystallization, precipitation, water, "chemical reaction", mineral, element, hematite, iron, oxygen, sand, sandstone
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Water and Moisture
|
06:42 - 08:06 (01:24) / 2.2 MB
|
"chemical weathering", weathering, water, moisture, "chemical decomposition", mineral, rainfall, "carbon dioxide", atmosphere, "carbonic acid", vegetation, soil, limestone, "rock composition", iron, oxygen, "iron oxide", limonite, geothite, hematite, rust
|
Ice Core Analysis
|
21:09 - 22:12 (01:03) / 1.5 MB
|
"Greenland Ice Core Program", Greenland, "ice core", "State University of New York - Buffalo", "gas composition", glacier, "glacial ice", nitrogen, oxygen, atmosphere, "Greenhouse Effect", methane, "carbon dioxide", "Ice Age", "biological activity"
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Seasonal Layers
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22:12 - 23:50 (01:38) / 2.5 MB
|
"Chester C. Langway Jr.", climate, "stable oxygen isotope", oxygen, snow, glacier, "glacial ice", "ice core", "Ice Age", precipitation, season, temperature, Antarctica, Greenland, Equator, climatologist, meteorologist, wind
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Geology School Keywords
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