The  physical phenomena that mark rocks of about 65.5 million years ago can be as easliy explained scientifically by the gigantic Deccan Traps eruptions as by the asteroid impact of Chicxulub.A. TrueB. False

Paleontologists disagree over whether the Chixculub asteroid event or the Deccan Traps volcanic activity was the primary source of the environmental changes that led to the extinction of the dinosaurs 66 million years ago. Recently, a team of researchers has concluded that only volcanic activity could cause those changes. To prove this, study leads Alexander Cox and Benhin Keller developed a computer model that simulated over 300,000 possible scenarios using data from the fossil record to determine which gases were present in the environment 66 million years ago. Their model showed that large amounts of carbon dioxide and sulfur were present in the atmosphere at the time of extinction. Which finding, if true, would most directly support Cox and Keller’s conclusion?Both the Chixculub asteroid event and the Deccan Traps volcanic activity have been known to have had a significant impact on gasses present in the atmosphere.eliminateThe existing data from the fossil record is limited and may not capture the full scale of the environmental changes that could lead to an extinction event.eliminateThe amount of carbon dioxide and sulfur in the atmosphere 66 million years ago is consistent with the emissions released by the Deccan Traps.eliminateThe computer model showed a sharp decrease in the amount of organic carbon (or plant and animal matter) at the time of the Chixculub asteroid impact.

(Q003) There is no rock record for the Earth's first 500 million years becauseGroup of answer choicesthe surface then was one huge ocean basin filled with hot water and nothing else.intense meteorite bombardment may have destroyed most land surface.billions of years of mountain building have destroyed the ancient rock.surface rock was too cool to allow the radiometric clocks to start ticking.

The K-T extinction event was characterized by - among other things - a high sulfur content in the atmosphere. This originated from A. emissions of the Deccan Traps B. volatilization of the S-bearing asteroid C. volatilization of the S-bearing impacted rocks

Geologists base their estimate that the Earth is 4.56 billion years old onGroup of answer choicesradiometric age dates on rocks from Wyoming.isotopic dating of meteorites thought to be from primitive solids of the early Solar System.cross-cutting relationships.the rate of cooling of the Earth since it formed.

What happened around 800 million years after Earth formed to allow rocks to form?A.Life began to appear.B.The ozone layer formed.C.Earth cooled sufficiently.D.The sun dimmed considerably