29 Dec hich of the following was a compon
Which of the following was a component of the Earth’s Hadean atmosphere?
Choose one:A. oxygenB. ammoniaC. ironD. ozone
Which of the following statements is true?
Choose one:A. Limestone that contains coral fossils probably developed in a shallow sea.B. A piece of gneiss radiometrically dated as 4.4 billion years old is the oldest whole rock yet found.C. Marine limestone that overlies alluvial fan conglomerate shows that the sea level dropped at that site.D. Shale that contains land plants probably formed in an alluvial fan or a stream channel.
Which of the following refers to fossils of early multicellular invertebrates that are 565 to 620 million years old?
Choose one:A. RodiniaB. stromatolitesC. cyanobacteriaD. Ediacaran fauna
Banded iron formations (BIFs) formed
Choose one:A. beneath the Laurentide ice sheet.B. in the Proterozoic deep ocean.C. in alluvial fans at the base of the proto-Appalachian Mountains.D. during uplift of the Tibetan Plateau.
Geologists believe that the impact of a 13-km-wide meteorite 65 million years ago
Choose one:A. generated 20-km-high tsunamis.B. generated a hot-air blast and blaze that caused worldwide forest fires.C. ejected debris into the atmosphere that produced acid rain.D. ejected chemicals into the atmosphere that caused thousands of years of winter-like night conditions that halted photosynthesis.
The continents that made up Pangaea came together in the early Paleozoic but began to split apart during the
Choose one:A. late Paleozoic.B. Late Triassic/Early Jurassic.C. middle Proterozoic.D. Early Devonian.
We know that the atmosphere became more oxygen-rich around 1.8 billion years ago (Ga) because of geologic evidence such as
Choose one:A. BIFs that occurred prior to 1.8 Ga but disappeared from the rock record after that time.B. abundant fossils of land plants, signifying the start of photosynthesis.C. redbeds that formed after 1.8 Ga.D. the presence of abundant pyrite after 1.8 Ga.
According to this diagram, which shows the stratigraphic record produced when sea level rises and falls over time, which of the following statements is true?
Choose one:A. Shale, covered by limestone and then sand, represents a transgression.B. Unconformities develop when sea level is at its highest point.C. Sand, covered by limestone and then shale, represents a sea-level rise.D. Each sequence represents two cycles of sea-level rise and fall.
Solar storms, like the one in the video, may have caused a dramatic increase in nitrous oxide in Earth’s early atmosphere
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