earths structure CH1 Flashcards
in your mind label the inside of the earth? (mantle) (outer core) (oceanic crust) (continental crust) (inner core)
inside order: inner core, outer core, mantle, crusts
explain continental drift?
the movement of continents over millions of years to their present location due to convection currents on the mantle
explain continental drift?
the movement of continents over millions of years to their present location due to convection currents on the mantle
name the 2 main minerals found in the earths core?
iron and nickel
name the 2 main minerals found in the earths core?
iron and nickel
what is the term for the boundary between earths crust and mantle?
moho discontinuity
what is the term for the boundary between earths crust and mantle?
moho discontinuity
what are endogenic forces?
forces that operate below the surface of the earth and create landforms
name an example of a mid ocean ridge?
carlsberg ridge
where does subduction take place?
where the oceanic plate is heavier
where does subduction take place?
where the oceanic plate is heavier
what plate boundary is found near north America and south America?
Nacza
what plate boundary is found to the right of Australia and near Asia?
pacific
what is the main difference in the formation of a dyke and a sill
Dykes are igneous rocks that intrude vertically (or across), while sills are the same type of rocks that cut horizontally (or along) in another land or rock form.
What is the name for the solid layer of rock around the earth which consists of the
upper mantle and the crust?
lithosphere
Explain the role of convection currents?
beneath the plates, move the plates in different directions
Explain divergent plate boundaries?
when 2 plates separate, magma rises and new rock is formed
Explain convergent plate boundaries?
when 2 plates collide, the thicker plate slides beneath the other plate (subduction). the oceanic plate melts as it reaches the hot mantle, mountains form from folding
what are endogenic forces?
forces that operate below the surface of the earth and create landforms
what is the main difference in the formation of a dyke and a sill
Dykes are igneous rocks that intrude vertically (or across), while sills are the same type of rocks that cut horizontally (or along) in another land or rock form.
where does subduction take place?
where the oceanic plate is heavier
Explain transform plate boundaries?
when 2 plates slide past each other. Tension builds up and eventually there is a slip and lots of energy is released causing earthquakes. San Andreas fault
what is the term for the boundary between earths crust and mantle?
moho discontinuity
what plate boundary is found near north America and south America?
Nacza
name the 2 main minerals found in the earths core?
iron and nickel
what plate boundary is found to the right of Australia and near Asia?
pacific
name an example of a mid ocean ridge?
carlsberg ridge
What is the name for the solid layer of rock around the earth which consists of the
upper mantle and the crust?
lithosphere
