Fire stones
What rocks come from volcanoes?
Igneous Rocks
What rocks come from dirt?
Sedimentary Rock
What rock does sedimentary rock transform into over time?
Metamorphic rock
What process happens to the igneous rock after it cools?
Weathering
What does 'Igneous' mean?
'Igneous' = Fiery
What rock comes from sand?
Sandstone
What does 'metamorphic' mean?
Changed
What is weathering? (List at least 3 examples)
What's the difference between lava & magma?
Lava = above ground
Magma = below ground
What is the formation process of these rocks called?
Lithification
What is needed to transform sedimentary rock into this rock?
Heat & Pressure
How do Sedimentary rocks turn into metamorphic rocks?
They melt again and turn back into lava & magma
They are cooled down molten rock (lava/magma)
What does sand look like under a microscope?
Like a bunch of tiny objects, shells, and crystals
What important stones come from metamorphic rocks?
Diamond, Quarts, Emerald, Saphire
Can an igneous rock turn directly into a metamorphic rock?
No. It has to turn into a sedimentary rock first.
What igneous rock did the Aztecs use for weapons? (It is sharper than a scalpel)
Obsidian
What is the word when wind and sand takes off particles of rock and gradually wears it down?
Erosion
What is the change that occurs in sedimentary rock to transform it into a metamorphic rock?
The pressure and heat changes the chemical structure within the rock
What is Lithification? What are the 3 steps? What is each step?
Lithification: is the process of forming sedimentary rock
3 steps:
Deposition - sediment is spread
Cementation - water moves/glues sediment particles
Compaction - pressure tightens and forms sedimentary rocks