Earth’s History: Fossils

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Earth's History: Fossils

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Question 11 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
What is radio active decay?
A
The preserved remains of an organism.
B
Atoms in an unstable element break down to form another element.
C
When things die and their remains are buried.
D
The time it takes for 1/2 of the radioactive atoms to decay in an element.
Question 12 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
Several different fossils were found in rock layers in a geologic column. Above these rock layers, the fossils were almost nonexistent. Which most likely explains these observations?
A
A nonconformity occurred
B
All the organisms migrated.
C
A period of mass extinction occurred.
Question 13 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
How is the geologic time scale divided?
A
major extinctions
B
major change in species
C
major change in geology
D
all of the above
Question 14 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
Which generalization can be made about the relative age of a fossil found in a sedimentary rock bed?
A
The fossil is younger than the rock layer above it.
B
The fossil was formed before the rock layer that contains it.
C
The fossil and the rock were formed in different environments.
D
The fossil was formed around the same time as the rock that contains it.
Question 15 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
Many fossils of large amphibians were found in an area that is currently barren desert. Which is most likely true?
A
The climate of the area was once much wetter than it is now.
B
Amphibians were once better at surviving in dry environments.
C
The amphibians migrated there after a catastrophic event destroyed their habitats.
D
The amphibians are not native to the area and their bones were brought there by other animals.
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