Study the graph about oxygen content of earth’s atmosphere. oxygen content of earth apostrophe s atmosphere line graph. x axis is millions of years before present. y axis is oxygen in volume percent. the line starts at 1000 millions of years before present at 4 percent oxygen, remains level until 625 millions of years before present, increases quickly to 13 percent oxygen, then increases slowly to 18 percent oxygen. the line jumps to 35 percent oxygen near 300 millions of years before present, drops quickly to 15 percent oxygen, then increases to 31 percent oxygen near 100 millions of years before present, before dropping down to 20 percent oxygen. which describes oxygen content as earth evolved over time? oxygen levels sharply declined about 400 million years ago. oxygen levels stay above 15 percent starting 200 million years ago oxygen levels remain below 5 percent starting 1000 million years ago. oxygen levels raise significantly between 1000 and 700 million years ago.
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what is your question? collegechemistry 5+3 pts in november 1987, a massive iceberg broke loose from the antartic ice mass and floated free in the ocean. the chunk of ice was estimated to be 98 mi long, 25 mi wide, and 750 ft thick. a typical backyard swimming pool contains about 24,000 gallons of water. how many of these pools could you fill from the water in this iceberg? (assume the iceberg is a rectangular solid of the above dimensions and consists of water only). express answer in scientific notation.
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Study the graph about oxygen content of earth’s atmosphere. oxygen content of earth apostrophe s atm...
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