Podcast
Questions and Answers
What is the main cause of the movement of tectonic plates?
What is the main cause of the movement of tectonic plates?
What is the process called when magma flows out at a rift and forms new oceanic crust?
What is the process called when magma flows out at a rift and forms new oceanic crust?
How does paleomagnetism provide evidence for seafloor spreading?
How does paleomagnetism provide evidence for seafloor spreading?
Which of the following features is often formed as a result of collision between tectonic plates?
Which of the following features is often formed as a result of collision between tectonic plates?
Signup and view all the answers
What occurs to the old hardened lava during the seafloor spreading process?
What occurs to the old hardened lava during the seafloor spreading process?
Signup and view all the answers
What part of the world did Laurasia primarily include?
What part of the world did Laurasia primarily include?
Signup and view all the answers
Which ocean separated Laurasia and Gondwana?
Which ocean separated Laurasia and Gondwana?
Signup and view all the answers
What major geological feature was formed when India collided with Asia?
What major geological feature was formed when India collided with Asia?
Signup and view all the answers
What theory did Harry Hess propose regarding the movement of the Earth's surface?
What theory did Harry Hess propose regarding the movement of the Earth's surface?
Signup and view all the answers
What process explains the movement of magma that leads to the formation of new sea floor?
What process explains the movement of magma that leads to the formation of new sea floor?
Signup and view all the answers
Which statement about the ocean floor is true?
Which statement about the ocean floor is true?
Signup and view all the answers
What characteristic of the Earth's mantle allows for the process of sea floor spreading?
What characteristic of the Earth's mantle allows for the process of sea floor spreading?
Signup and view all the answers
Which continental landmass was originally joined to Antarctica?
Which continental landmass was originally joined to Antarctica?
Signup and view all the answers
Who first speculated the idea of continental drift?
Who first speculated the idea of continental drift?
Signup and view all the answers
What name did Alfred Wegener give to the large landmass formed by continental collisions?
What name did Alfred Wegener give to the large landmass formed by continental collisions?
Signup and view all the answers
What type of fold occurs when the two limbs of a fold are still horizontal?
What type of fold occurs when the two limbs of a fold are still horizontal?
Signup and view all the answers
Which process refers to the movement of the Earth's continents relative to each other?
Which process refers to the movement of the Earth's continents relative to each other?
Signup and view all the answers
What occurs during sea-floor spreading?
What occurs during sea-floor spreading?
Signup and view all the answers
During which geological era did Pangea begin to break apart?
During which geological era did Pangea begin to break apart?
Signup and view all the answers
What is a characteristic of anticlines in geological structure?
What is a characteristic of anticlines in geological structure?
Signup and view all the answers
What geological feature is primarily formed through the process of tectonic plate movement?
What geological feature is primarily formed through the process of tectonic plate movement?
Signup and view all the answers
Study Notes
Earth Science Quarter 2 - Module 3: Rock Stress and Seafloor Spreading
- This module covers how rocks respond to different stresses (compression, tension, and shear), focusing on how seafloor spreading occurs.
- Students will learn to describe rock behavior under various stresses, identify different rock stress types and deformations, and explain seafloor spreading.
- Seafloor spreading involves the creation of new ocean floor at mid-ocean ridges, with older rocks moving away from the ridge.
- Evidence supporting seafloor spreading includes younger rocks at the mid-ocean ridge and older rocks farther away. Sediment thickness also supports this theory, with thinner sediments closer to the ridge.
- Convection currents in the mantle are the driving force behind plate movement and seafloor spreading.
- Rocks experience different types of stress:
- Lithostatic stress: Equal pressure from all directions, like water pressure.
- Differential stress: Unequal pressure, leading to tensional, compressional, and shear stresses.
- Tensional stress: Rocks are pulled apart.
- Compressional stress: Rocks are squeezed together.
- Shear stress: Rocks are pulled in opposite directions, causing slippage.
- Rock deformation can be elastic (reversible) or brittle (irreversible, leading to fractures).
- Faults are fractures in rocks with movement along them.
- Normal faults: Hanging wall moves down relative to the footwall (often related to tensional stress).
- Reverse faults: Hanging wall moves up relative to the footwall (often related to compressional stress).
- Strike-slip faults: Rocks slide horizontally past each other (often related to shear stress).
- Folds are bends in rock layers, caused by pressure.
- Anticlines: Upward-arching folds.
- Synclines: Downward-bending folds.
- Monoclines: Simple bends in relatively flat layers.
- The module also includes activities to identify different types of rock stress, rock deformation and the processes involved in seafloor spreading..
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz covers the concepts of rock stress types, including compression, tension, and shear, as well as the process of seafloor spreading. Students will explore how rocks behave under various stresses and the evidence supporting seafloor spreading, such as the age of rocks and sediment thickness. Convection currents and their role in plate movement are also discussed.
