Geologic History

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Geologic History

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Question 1 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
Scientists chose where units of geologic time began and ended based on major changes in life forms at certain times.
A
true
B
false
Question 2 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
The ..... era covers almost 90% of earth's history.
A
Paleozoic
B
Mesozoic
C
Cenozoic
D
Precambrian
Question 3 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
Rock layers tell a story about their past. What is the basic assumption that is made when reading this story?
A
The composition of the Earth's atmosphere has been constant.
B
The Earth's crust cooled and then remelted before rock layers began to form.
C
The processes in the rock cycle were the same in the past as they are today.
D
Chemical reactions in the past were slower than they are today.
Question 4 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
Which of the following conditions help preserve organisms as fossils
A
quick burial by sediments
B
correctchoice hard parts
C
correctchoice protection from scavengers
D
activities of microorganisms
Question 5 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER]
What can we learn from fossils?
A
How earthquakes formed.
B
How erosion changed mountains
C
How Earth's magnetic field was formed
D
How Earth's environment has changed
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