layers of the earth
what is the innermost layer of the earth
inner core
list the three types of rock
-sedimentary
-metamorphic
-igenous
what does the word luster mean?
to reflect light
what layer of the earth has convection currents?
-mantle
which layer of the core is solid
inner core
what is lava called when it is found underground?
magma
how do you check the hardness of a rock?
the scratch test
what is the largest layer of the earth?
mantle
which portion of the crust is found covered in land
continental
what type of rock is created when small pieces over time cement together
sedimentary
slow cooling results in what kind of mineral?
large
when you get deeper in the earth the temperature gets ________________ and the pressure gets ___________
hotter
stronger
how is the core solid?
Pressure of the surrounding layers
what kind of rock occurs when lava cools
igneous
list 3 ways to test and categorize a mineral?
-hardness
-luster
-color
-fracture
-density
in convection currents hot rock moves from near the _____________ to near the _______
-core
- crust
what is the most abundant mineral in the core
-iron
explain the rock cycle
metamorphic rock becomes magma
list 3 characteristics of a mineral
-crystallization
-chemical composition
-inorganic
what 3 things do magnetic forces do?
- protects from solar winds
-allows compasses to work
-creates the northern lights