Rocks
Rocks are mixtures of .....
Minerals
The hardest mineral is
Diamond
The theory that the continents drifted slowly over time is
Continental drift
Plates collide or come together at this boundary
Convergent
The three types of rocks are
Igneous, metamorphic and sedimentary
What is the process of one rock changing to another
Rock cycle
The softest mineral is
Talc
The theory that the earth is broken into plates that move is
Plate tectonics
Lava cools and hardens to form _______ rock on the Earths surface
Extrusive
Heat and pressure form this rock
Metamorphic
A rock’s Composition describes .....
How the rock was formed
The way a mineral reflects light is described as its
Luster
Plates slide or slip past each other at ________ boundaries
Transform
Magma cools and hardens to form______ rocks below Earths surface
Intrusive
This rock forms when lava or magma cools and hardens
Igneous
The mineral grains in a rock and how they fit together is described as
Texture
The powdered form of a mineral
Streak
Plates pull apart at what boundary
Divergent
This is a metamorphic rock that has its grains lined up in layers
Foiliated rock
Sedimentary rocks form when
Sediments erode and get deposited in layers and compact and cement together over time
This type of sedimentary rock contains material from once living things
Organic rock
What are the 5 characteristics of minerals
Inorganic
Solid
Crystal structure
Definite chemical composition
At this boundary subduction occurs to form trenches and volcanoes
Convergent
How do mountain ranges form
When two continental crust collide at a convergent plate boundary
What process has to occur for a metamorphic rock to form an igneous rock
Melting