Which statements can be inferred from the Paleozoic era time scale?There was volcanic activity during the Paleozoic era.Dinosaurs existed in the middle part of the Paleozoic era.Marine organisms existed in the early part of the Paleozoic era.Ammonites existed before the trilobites did during the Paleozoic era.Erosion and deposition were processes that occurred during the Paleozoic era.
Which ideas did you include in your answer? Check all that apply.
How do scientists use relative and absolute dating and the geologic time scale to organize Earth's 4.6-billion-year-old history?
Scientists organize Earth's 4.6-billion-year history by combining relative dating (ordering rock layers via superposition) and absolute dating (numeric ages via radiometric decay). This data is used to construct the geologic time scale, dividing time into eons, eras, periods, and epochs to map major geological and evolutionary events.
How many atoms will there most likely be at the third half-life of potassium-40 in this model? A model rock layer had 50 pennies (atoms of potassium-40). How old is the rock layer?
✔ 1.3 billion years old2.6 billion years old3.9 billion years old
Did you find these answers helpful?