Volcanic Eruptions Eject __________ __________ into the Atmosphere, a Greenhouse

Q40: Layers of sedimentary rock are _ if

Q41: Dinosaurs evolved during the _ Era.

Q42: _ _ refers to time measured in

Q43: The longer the time span that a

Q44: The principle of _ _ states that

Q46: Humans evolved during the _ Era/Eon.<br>A) Cenozoic<br>B)

Q47: A/an _ is an unconformity in which

Q48: The principle of crosscutting relationships states that

Q49: Precambrian refers to all the time before

Q50: The earliest fossils have been found from