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Biology 20 Online
OpenStudy (anonymous):

During which era in earth’s history did dinosaurs roam the earth? A. Mesozoic B. Cenozoic C. Paleozoic D. Precambrian

OpenStudy (anonymous):

is it D.?

OpenStudy (anonymous):

its A

OpenStudy (anonymous):

Dinosaurs lived between 230 and 65 million years ago, in a time known as the Mesozoic Era. This was many millions of years before the first modern humans, Homo sapiens, appeared. Scientists divide the Mesozoic Era into 3 periods: the Triassic, Jurassic and Cretaceous.

OpenStudy (anonymous):

thank you

OpenStudy (anonymous):

np

OpenStudy (anonymous):

Which sentence best describes the information provided by radiometric dating? A. Age is based on the type of rock. B. Age is based on radioactive materials that are in the rock. C. Age is relative to other rocks in the area. D. Age is based on fossils that are found in the rock.

OpenStudy (anonymous):

is it D??

OpenStudy (anonymous):

plz help

OpenStudy (anonymous):

Correct

OpenStudy (anonymous):

D. Age is based on fossils that are found in the rock.

OpenStudy (anonymous):

thank you

OpenStudy (anonymous):

np

OpenStudy (anonymous):

What patterns in the magnetism of the rocks along the oceanic ridges explain seafloor spreading? A. The rocks on one side of the ridge were aligned in one direction, while the rocks on the other side of the ridge were aligned in the opposite direction. B. The magnetic patterns showed only one direction but were symmetrical on both sides of the ridge. C. The magnetic patterns periodically reversed and were symmetrical on both sides of the ridge. D. The magnetic patterns periodically reversed only on one side of the ridge.

OpenStudy (anonymous):

would it be B?

OpenStudy (anonymous):

someone please help me

OpenStudy (davidmccune):

correct

OpenStudy (aaronq):

radiometric dating deals with radioactive elements NOT fossils

OpenStudy (anonymous):

NO ITS B I LOKKED IT ON GOOGLE

OpenStudy (phebe):

Mesozoic but it was split into 3- Triassic, Jurassic and Cretaceous. Dinosaurs lived from the late Triassic Period, Jurassic Period and Cretacious Period. Dinosaurs died in the Late Cretacious Period 65 Million Years Ago so for the first one its A

OpenStudy (praetorian.10):

it is option E

OpenStudy (praetorian.10):

@arabpride right?

OpenStudy (anonymous):

you can close the question now

OpenStudy (arabpride):

it's actually option E and a half ;3

OpenStudy (praetorian.10):

come back dammit

OpenStudy (arabpride):

ding!! lolz i dont think ill be on for a while tho :P

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