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
|
Algae the Oldest Fossils
|
01:13 - 02:04 (00:51) / 0.8 MB
|
"James Sadd", algae, fossil, Australia, Africa, "North American Continent", plant, animal, life, origin, bacteria
|
Stromatolites
|
03:55 - 04:59 (01:04) / 1.4 MB
|
fossil, "marine organism", bone, shell, stromatolite, algae, oxygen, atmosphere, evolution, "sedimentary rock"
|
Life on Land
|
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"
|
Biological Contribution
|
07:42 - 08:56 (01:14) / 1.3 MB
|
"sedimentary rock", "chemical sedimentation", ocean, "biological activity", algae, coral, invertebrate, "calcium carbonate", shell, reef, "sea floor", limestone, fossil, chalk, plant, animal, life, "continental shelf", radiolaria, diatom, silica, chert, diatomite
|
Geology School Keywords
|