Question | Answer |
What are rock forming minerals? | the common minerals used to make rocks |
What does the rock cycle show? | major processes that make the rocks |
What are the major processes in the rock cycle? | melting, cooling, pressure, heat, weathering and erosion |
What are metamorphic rocks? | rocks that change their shape |
What makes metamorphic rocks change shape? | heat and pressure or hot watery fluids |
Is an altered rock a metamorphic rock? | yes |
What are the two ways to classify metamorphic rocks? | foliated or nonfoliated |
What does foliated mean and wat r some examples? | mineral grains that form in parallel lines; slate, gneiss, shale |
Whats a nonfoliated rock? | when mineral grains grow and rearannge but dont form layers; marble, quartzite |
Whats a sedimentary rock? | a rock made of sediments that were compressed or cemented together |
What are sediments? | loose materials of rock thats been moved by water,wind ice and gravity |
How do u classify sedimentary rocks? | how they form, and wat they're made of; the groups are detrital, chemical or organic |
what are detrital sedimentary rocks? | rocks that form from broken pieces of other rocks; ex: congloremate and sandstone |
what are chemical sedimentary rocks? | they form from dissolved minerals out of solutions, usually not from preexisting rocks; ex.: limestone & rocksalt |
What are organic sedimentary rocks? | form from: once living things ex.: coal-dead plants , chalk-microscopic shells, fossil-rich limestone |
What are igneous rocks? | rocks that form from lava or magma. |
Why does lava rise? | its less dense the magma |
What are the 2 ways to classify igneous rocks? | extrusive and intrusive |
what are intrusive igneous rocks? | rocks that form inside of volcanoes that cool slowly and have large crystals |
What are extrusive igneous rocks? | rocks formed by magma that cool quickly and have small crystals |