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True or false: a fault is younger than a rock it cuts through.
Permian
and land bridge once connected the 2 continents
Ocean
birds
Migration
True
Half Life
4.5 billion years
Which of the following is NOT a reason why scientists believe animals such as wooly mammoths and saber toothed cats became extinct?
Permian
and land bridge once connected the 2 continents
Ocean
birds
Migration
True
Half Life
4.5 billion years
Uranium 238 has a half life of 4.5 billion years. If a 4g sample has decayed to 2g, what is the age of the sample?
Permian
and land bridge once connected the 2 continents
Ocean
birds
Migration
True
Half Life
4.5 billion years
The time needed for one half of an isotope to decay.
Permian
and land bridge once connected the 2 continents
Ocean
birds
Migration
True
Half Life
4.5 billion years
A rock with coral and shells in it would have existed in which environment originally?
Permian
and land bridge once connected the 2 continents
Ocean
birds
Migration
True
Half Life
4.5 billion years
During which period did the greatest mass extinction on Earth occur?
Permian
and land bridge once connected the 2 continents
Ocean
birds
Migration
True
Half Life
4.5 billion years
Humans were able to migrate from Asia to North America because...
Permian
and land bridge once connected the 2 continents
Ocean
birds
Migration
True
Half Life
4.5 billion years
Dinosaurs are the ancestors of which living organism?
Permian
and land bridge once connected the 2 continents
Ocean
birds
Migration
True
Half Life
4.5 billion years
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