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WorksheetsEarth's History Review Station #3
Total questions: 10
Worksheet time: 6mins
Name
Class
Date
1.
The Mid-Atlantic Ridge exists between the African and South American geologic plates. Which process most often occurs at the Mid-Atlantic Ridge?
a)
Destruction of underwater mountains
b)
Creation of new continents
c)
Subduction of geologic plates
d)
Spreading of sea floor
2.
Based on the Law of Superposition, what can be concluded about fossils?
a)
Fossils give clues about past climate patterns.
b)
Fossils form from the hard parts of organisms.
c)
The oldest fossils are found in the lowest rock layers.
d)
The most recent fossils were advanced organisms.
3.
Fossils of warm-weather plants were found on an island in the Arctic Ocean. What can best be concluded from this discovery?
a)
Spores of plants drifted by air currents to the island.
b)
Ocean currents carried the plants to the island.
c)
The island drifted from a tropical region to its present location.
d)
Seeds of plants have been carried to the island by migratory birds.
4.
What is the difference between relative dating and absolute dating?
a)
Relative dating can estimate a rock’s age only in relation to other objects or events, while absolute dating can provide an actual age.
b)
Relative dating uses several types of radioactive decay to determine an object’s relative age, while absolute dating only uses the half-life or uranium 235.
c)
Relative dating provides the exact age of a rock, while absolute dating provides a rough estimate of the rock’s age.
d)
Relative dating and absolute dating can only determine the rock’s age in relation to other objects or events.
5.
How does an unconformity change a scientist’s understanding of the history of Earth?
a)
It reduces that understanding because rock layers representing thousands or millions of years are missing.
b)
It increases that understanding because the changes in the positions of rock layers show how forces acted on Earth.
c)
It reduces that understanding because fossils have been removed from an unconformity.
d)
It increases that understanding because an unconformity contains rock layers that are absent in other areas.
6.
A layer of volcanic ash may serve as a time marker because the ash is
a)
generally deposited only on land
b)
composed of index fossils
c)
deposited rapidly over a large area
d)
often a distinct color
7.
Which of the following is NOT a difference between carbon and radioactive dating?
a)
Carbon dating uses carbon, while radioactive dating uses other elements.
b)
Carbon dating is only good for samples less than 60,000 years old while radioactive is for older samples.
c)
Only carbon dating uses the decay of isotopes to date an organism.
d)
The sample must have been alive in carbon dating but doesn’t have to be in radioactive dating
8.
Which sequence of events, from oldest to youngest, has occurred in this outcrop?
a)
sedimentary layers → igneous intrusion → folding → faulting
b)
igneous intrusion → sedimentary layers → folding → faulting
c)
igneous intrusion → faulting → sedimentary layers → folding
d)
sedimentary layers → folding → igneous intrusion →faulting
9.
The diagram on the right shows one side of an oceanic ridge and a portion of the ocean floor.Which graph below best illustrates the age of the basalt as the distance from an oceanic ridge increases?
a)
Graph A
b)
Graph B
c)
Graph C
d)
Graph D
10.
Approximately how far has the Pacific Plate moved since Necker Island was located over the hot plume at X?
a)
300 km
b)
1,100 km
c)
1,900 km
d)
2,600 km
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