Worksheets7H UNIT 5
Total questions: 16
Worksheet time: 8mins
Scientists have found some of the same types of rock containing the same types of fossil species in Africa and Antarctica. Which explanation does this information support?
Both continents gradually increased in size over time.
Both continents were attached by glacial ice millions of years ago.
Both continents were attached but drifted away from each other over time.
Both continents were underwater millions of years ago.
The Theory of Plate Tectonics developed from a synthesis of other theories. Which combination of the following theories was most directly responsible for the development of the Theory of Plate Tectonics?
Continental Drift and Seafloor Spreading
Uniformitarianism and Catastrophism
Hotspot Theory and Elastic Rebound
Rock Cycle and Relative Dating
The diagram shows Earth "Before" as Pangaea and "After" with modern continents and oceans labeled (e.g., North America, Eurasia, Africa, Pacific ocean, Atlantic ocean, Indian ocean, Southern ocean, Arctic ocean). The diagram is showing a period of plate movement in Earth’s history. Why would studying plate movement be important to scientists that study geologic time?
In this time period, there were many less species of organisms on Earth.
During this time period, man had developed the theories of continental drift and plate tectonics.
The study of plate tectonics can help scientists predict future locations of continents and oceans if movements continue in the same directions.
The diagram below models the movement of two tectonic plates. What is occurring as a result of the plate collision?
A mid-ocean ridge is forming.
Subduction is occurring because oceanic crust is denser than continental crust.
A divergent boundary is forming.
A transform boundary is forming due to two plates sliding past one another.
When the edges of tectonic plates shift and energy is released, what is the most likely result?
Earthquakes
Volcanoes
Mountain formation
Island formation
The Pacific Ocean basin is the oldest, largest, and deepest of the existing ocean basins in the world. Its area is about 59 million square miles, and all of the continents could fit into it. Ocean basins form at which type of plate boundary?
Transform
Divergent
Convergent
Oceanic
Which of these landforms is most likely to be found at a convergent boundary?
Fault line
Mid-ocean ridge
Mountain
Rift valley
Which letter represents a divergent plate boundary in the above image? A cross-section of Earth’s lithosphere shows labeled points W, X, Y, and Z along various plate boundaries, with arrows indicating plate motion and volcanic activity.
W
X
Y
Z
Which statement best describes the movement of Earth’s plates?
The plates moved for millions of years but have now stopped.
There is no evidence that plates ever moved.
The plates stayed in one place for millions of years but are moving now.
The plates are constantly moving.
According to the theory of plate tectonics, where do most active volcanoes occur?
Along plate boundaries where plates interact
In the middle of stable continental interiors far from boundaries
Evenly spread across oceans and continents with no pattern
Only near the equator regardless of plate boundaries
One of the major transform boundaries in the world is on the southwestern margin of the North American Plate along the San Andreas fault system. Which type of geologic event is most likely to occur along this boundary?
Volcano
Seafloor spreading
Mountain building
Earthquake
Describe the relationship between plate tectonics and major geologic events.
Movements at plate boundaries cause earthquakes, volcanic activity, and mountain building.
Plate tectonics only affects ocean currents and weather, not geologic events.
Major geologic events occur randomly without relation to plate motions.
Plate tectonics causes erosion by wind and rivers, leading to most geologic events.
Which of the following sequences most likely represents ecological succession on a recently abandoned wheat field?
Grasses → flowering plants → shrubs → native trees
Native trees → shrubs → flowering plants → grasses
Shrubs → grasses → native trees → flowering plants
Flowering plants → native trees → shrubs → grasses
A hurricane hits a coastal prairie and destroys the habitat. Years later there is an appearance of small plants with rapidly spreading roots. This vegetation describes —
a microhabitat
primary succession
secondary succession
biodiversity
When forest fires destroyed many of the pine trees in Bastrop State Park, the burned areas began secondary succession. What is the role of succession in this example?
Creating new soil by chemical and physical weathering of rocks
Restoring the ecosystem through grass, shrub, and tree stages
Changing the landscape to be more fire resistant in the future
Opening the land for new uses like farming and raising livestock
Which is NOT an example of primary succession?
Decomposing organic matter forms soil
Presence of existing fertile soil
Long-term occurrence over extended time
Barren land once covered by a glacier
