Science Lesson 1: Understanding the Pieces Flashcards
(30 cards)
Supercontinent/ Great Land Mass
Pangaea
Study of the structure, evolution and dynamics of Earth
Geology
Giant pieces of Earth’s crust
Plate Tectonics
It states that Earth’s lithosphere is composed of fragments or plates that move around and interact with one another
Plate Tectonics Theory
It came from the latin word “tectonicus” or Greek word “tektonikos”
Tectonics
When a plate goes underneath another plate
Subduction
Made up of various type of rocks and sediments floating on top of the malleable upper mantle
Crust
Thin part of Earth’s crust that underlies the ocean basins
(5-10 km thick)
Oceanic crust
Thicker and less dense than oceanic crust
Continental crust
It is the layer between the crust and outer core
Mantle
Region of Earth’s crust and upper mantle that are fractured into plates
Lithosphere
It is liquid because the temperature are adequate to melt the iron-nickel alloy
Outer core
How many lithospheric plates is Earth’s crust fractured into?
13 major and 20 total lithospheric plates
It is solid because tremendous pressure is strong enough to crowd the atoms tightly together
Inner core
How many volcanoes erupted in the Philippines
24 erupted volcanoes
Outermost layer of the Earth
(3-44 miles and 5-70 km thick)
Crust
Denser and thinner than continental crust
Oceanic crust
What percentage of volcanoes are found in the Ring of Fire?
75% of active volcanoes
A scientific theory that explains how major landforms are created as a result of Earth’s subterranean movements
Plate Tectonics Theory
Thick part of Earth’s crust that forms large landmasses
(30-50 km thick)
Continental crust
Magma builds a series of volcanoes
Volcano arc
Greek word “tektonikos” meaning to _____
To build
Many active volcanoes are found here
Pacific Ring of Fire
What percentage of earthquakes are found in the Ring of Fire?
90% of earthquake
