WorksheetsESci Review 5
Total questions: 16
Worksheet time: 8mins
For which segment of the Earth's history are fossils rarely found?
Cenozoic
Mesozoic
Paleozoic
PreCambrian
Approximately 2.2 billion years ago, which gas was first added in large amounts to Earth’s atmosphere from life-forms that evolved in the oceans?
carbon dioxide
oxygen
nitrogen
water vapor
This timeline represents the three most recent geologic eras. The numbers represent 4 events in Earth's history. Which number best represents when humans are inferred to have first appeared on Earth?
1
2
3
4
About when did the dinosaurs go extinct?
66 million years ago
146 million years ago
163 million years ago
190 million years ago
An archeaologist found an ancient skeleton estimated to be 10,000 to 25,000 years old. Which radioactive isotope would be most useful for finding the age of the skeleton?
carbon-14
potassium-40
uranium-238
rubidium-87
The characteristic of radioactive isotopes that make them useful for accurately determining the age of a rock or fossil is the
organic origin
constant half-life
common occurrence in sediments
resistance to erosion and weathering
A bar graph of the radioactive decay of carbon-14 is shown. The solid shaded sections of the bars on the graph represent the percentages of
carbon-14 from the original sample that has not yet decayed
uranium-238 from the original sample that has not yet decayed
nitrogen-14 decay product resulting from the radioactive decay
lead-206 decay product resulting from the radioactive decay
What is the approximate age of an igneous rock that contains only one-fourth (1/4) of its original potassium-40 content due to radioactive decay?
1.3 x 10^9 years old
2.6 x 10^9 years old
3.9 x 10^9 years old
5.2 x 10^9 years old
Which lettered layer came first?
A
C
H
K
Which layers came before the fault?
K, C, D, and E only
A and G only
I and H only
K and C only
How do you know intrusion H came after layers K, C, D, and E?
H starts at the bottom
H cuts across layers K, C, D, and E
H reaches layer C
H is cut across by I
What happened to letters K, C, D, E, and F before layer G was deposited?
they were all tilted
thy were all folded
they were all melted
nothing happened to them prior to G being deposited
The diagrams show demonstrations that represent the behavior of two seismic waves, A and B. Which statement concerning the demonstrated waves is correct?
Wave A represents a P-wave and wave B represents an S-wave
Wave A represents an S-wave and wave B represents a P-wave
Wave A represents P-waves in the crust and wave B represents P-waves in the mantle
Wave A represents S-waves in the crust and wave B represents S-waves in the mantle
Compared to the focus of an earthquake, the epicenter
is deeper in the crust
is where the waves first reach the surface
receives S-waves first
does not receive seismic waves at all
The diagram represents 3 seismograms showing the same earthquake as it was recorded at three different seismic stations, A, B, and C. Which statement correctly describes the distance between the earthquake epicenter and these seismic stations?
A is closest and C is farthest from the epicenter
B is closes and C is farthest from the epicenter
C is closest and A is farthest from the epicenter
A is closest and B is farthest from the epicenter
The cutaway diagram shows the paths of earthquake waves generated at point X. Only P-waves reach the side of Earth that is opposite the focus because P-waves
are stronger than S-waves
are faster than S-waves
can travel through liquids and S-waves cannot
originate at all points on Earth's surface
