How are eras and periods of the geologic time scale named?
oceansfossilsthe atmosphere
PrecambrianPaleozoicCenozoic
before after during
Scientists used [___] dating to determine Earth’s age.
radiometric
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
Use the drop-down menus to match each description to the geologic era it describes.
Paleozoic Mesozoic Cenozoic
PaleozoicMesozoic Cenozoic
From what material did the moon form?
Which processes produced heat that contributed to the formation of Earth’s different layers? Check all that apply.collision of materialscompaction of materialscooling of low-density metalsradioactive decaysinking of high-density metals
Paleozoic MesozoicCenozoic
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