rocks
what are the 3 types of rocks ?
sedimentary, igneous, and metamorphic
what is a mineral ?
a naturally occurring inorganic element or compound having an orderly internal structure and characteristic chemical composition, crystal form, and physical properties
what type of volcanoes have steep sides ?
composite volcano
what are the 3 types of plate boundaries ?
convergent, divergent, and transform
how many layers of the earth is there ?
the core, the mantle, and the crust
how is a rock formed ?
physical changes such as melting, cooling, eroding, compacting, or deforming
what scale tells the hardness of a mineral ?
the moh's hardness scale
what are the 3 types of volcanoes ?
composite, cinder cone, and shield volcano
what happens at a convergent plate boundary ?
plates move toward each other
what is the thinnest layer of the earth ?
the crust
what type of rock is formed when magma cools in earth's crust ?
igneous rocks
chemical elements
what causes volcanoes ?
when one tectonic plate moves under another
what happens at a divergent plate boundary ?
plates move apart
what is earth's hottest layer ?
the inner core
all rocks are constantly passing through a recycling process.
true or false ?
true
what is the hardest mineral on the moh's scale ?
a diamond
what do you call a volcano that has recently erupted or may erupt in the future ?
a dormant volcano
what happens at a transform plate boundary ?
plates slide past each other
what layer floats on top of the mantle ?
the asthenosphere
how are rocks changed ?
erosion and weathering
what is a mineral in it's powered form ?
streak
what volcano destroyed pompeii ?
mount vesuvius
what happens at a subduction zone ?
one plate bends and slides underneath another plate and it curves down into the mantle
which layer generates earth's magnetic field ?
the core