Earth Science-Chapter 12-13: Question Preview (ID: 22599)


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A rock with coral and shells in it would have existed in which environment originally?
a) Swamp b) Lake c) Ocean d) Forest
During which period did the greatest mass extinction on Earth occur?
a) Permian b) Cretaceous c) Devonian d) Triassic
The time needed for one half of an isotope to decay.
a) Half Life b) Radioactivity c) Extinct d) Isotope decay
Which of the following is NOT a division on the geologic time scale?
a) Era b) Eon c) Period d) Century
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?
a) 4.5 billion years b) 2.25 billion years c) 9 billion years d) 13.5 billion years
Which of the following is NOT an advantage mammals have over reptiles?
a) Walk upright b) Body hair/fur c) Warm blooded d) Efficient heart/lungs
True or false: a fault is younger than a rock it cuts through.
a) True b) False c) d)
Dinosaurs are the ancestors of which living organism?
a) birds b) lizards c) snakes d) frogs
Humans were able to migrate from Asia to North America because...
a) and land bridge once connected the 2 continents b) they sailed across the ocean c) they could swim really far d) the continents were closer together then
Which of the following is NOT a reason why scientists believe animals such as wooly mammoths and saber toothed cats became extinct?
a) Migration b) Climate change c) Disease d) Humans hunting them
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