<span>Minerals have an ordered internal atomic arrangement which means that the atoms which make up the mineral are arranged in an ordered geometric pattern or also known as the crystal structure. Thus, it can be concluded that all minerals are crystals. The crystal structure is the same for the same type of mineral. For example, every piece of quartz found anywhere have the same crystalline structure. </span>
The older the rocks were the more like they were to have fossils.
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Scientists estimate that 50-80% of the oxygen production on Earth comes from the ocean. The majority of this production is from oceanic plankton — drifting plants, algae, and some bacteria that can photosynthesize. One particular species, Prochlorococcus, is the smallest photosynthetic organism on Earth.
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