Use the drop-down menus to answer the questions.
✔ It was at the top of all the layers.It was in the middle of the layers.It was at the bottom of all the layers.
123✔ 4
12✔ 34
In this lab, you determined the relative ages of rock layers using the principles of relative dating. The [___] says that a rock layer found closer to Earth’s surface is [___] a rock layer that is deeper in Earth’s surface. The [___] states that intrusions are [___] the rock layer they cut across. You also determined the absolute ages of rock layers using a [___]. The data you gathered helped you identify an unknown fossil.
older thanthe same age as✔ younger than
law of relative datinglaw of superposition✔ principle of cross-cutting relationships
older thanthe same age as✔ younger than
mass specmeter✔ mass spectrometermass spectometer
How many atoms will there most likely be at the third half-life of potassium-40 in this model?
✔ 1.3 billion years old2.6 billion years old3.9 billion years old
Use the drop-down menus to answer the questions.
Number the events (1-4) based on the order that they happened, with 1 being the first thing that happened and 4 being the last.
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.
✔ ammonitecrinoidtrilobite
✔ 1234
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?
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