>2nd week Plate Tectonics and Minerals
>
>Mid-ocean ridges are examples of what type of boundary?
> (a) divergent
>
>The tectonic plates are pieces of the:
> (a) lithosphere
>
>Continental lithosphere does not get subducted because:
> b) it is not dense enough.
>
>The San Andreas fault system is an example of a:
> c) transform boundary.
>
>Why was the major problem with Wegener's theory of continental drift?
> b) He proposed that the continents moved across the ocean floor.
>
>Which of the following can be explained by plate tectonics?
> d) all of the above
>
>Symmetrical bands of normal and reversed magnetism are observed on either
zone of:
>b) mid-ocean ridges.
>
>The sinking of an oceanic plate beneath another plate is called:
>a) subduction
>
>Which of the following has been used as evidence for continental drift?
> e) all of the above
>
>Divergent plate boundaries are places where:
> d) new oceanic lithosphere is forming
>
>The most abundant minerals in the Earth's crust are:
>b) silicates
>
>ALL solids that have an orderly internal structure are:
>.(b) crystalline
>
>The 4 most common elements in the Earth's crust are, in order, from most
common to least common:
>(b) oxygen, silicon, aluminum, iron
>
>Which of the following is not a mineral?
> (d) glass
>
>All silicate minerals are made up of basic building blocks known as:
> c) silica tetrahedra
>
>Which of the following is not characteristic of ALL minerals:
>d) contains silica tetrahedra
>
>A(n) _________is a substance that cannot be broken down into other
substances by ordinary chemical methods.
>b) element
>
>Framework silicates have _______ silica and _________ iron and magnesium
than isolated silicates.
>c) more, less
>
>Diamond and graphite have the same _____________ but different _____________.
>d) composition, crystal structure
>
>All minerals are __________.
>d) all of these
>
>The type of bonding where electrons are transferred from one atom to
another is known as:
>a) ionic