24 Questions
What percentage of the Earth's internal heat is contributed by the decay of radioactive elements?
50%
What is the process by which the melting point of rocks is decreased by diluting in water or carbon dioxide?
Flux Melting
What is the term used to describe the process of rocks melting due to differences in their melting points?
Partial Melting
What pattern do the active fractures in the Lithosphere along the ocean floor exhibit?
A pattern that mimics the shapes of the continental coastlines
What is the age of the oldest seafloor rock found?
180 million years old
What is the term used to describe the formation of composite volcanoes around the subduction zones of the Pacific plate?
Pacific Ring of Fire
What is the result of chemical weathering in cave systems with high Calcium content?
Stalactites and stalagmites
What is the process of weathering where water reacts with CO2 to form weak acids?
Carbonation
What is the term for the expansion of moisture inside rocks, causing lattice and fractures in the rock?
Freeze-thaw
What is the temperature range of the Crust?
200°C to 1000°C
What is the process of geological activities taking place below the Earth's surface?
Plutonism
What is the relationship between pressure and melting point?
As pressure increases, the required temperature to melt a material also increases
What happens to sediments as oceanic crust subducts?
They are carried with the subducting crust, rich in silicates
What is the result of the higher silicon content in magma?
More violent volcanoes
What is observed on either side of the mid-ocean ridge?
Similar patterns of seafloor magnetism
What is the stage of an ocean basin when a rift valley is formed?
Embryonic ocean basin
What happens to a narrow sea as continents diverge?
It expands and becomes a larger ocean
What is the current stage of the Atlantic Ocean?
Mature ocean basin
What occurs when an ocean is surrounded by converging continents?
The ocean basin is stripped of its materials due to subduction
What is the result of the collision of continents?
The creation of a mountainous region
What is the primary function of index fossils?
To act as markers to the age of the layers of the crust
What is the term for the process of ocean basin materials melting back into the mantle?
Recycling process
Why do continents hold greater amounts of evidence of geological history?
Because the recycling process is a faster rate of destroying rocks than the weathering and erosion on the continent
What is the term for the process when an ocean turns into a sea?
Terminal ocean basin
Learn about the chemical processes of weathering, including oxidation, carbonation, hydrolysis, and hydration, and how they affect rocks and minerals. Discover how stalactites and stalagmites are formed in cave systems.
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