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rocks
quest :)
| ? | A |
|---|---|
| what are igneous rocks made of? | hot molten rock cooling (lava or magma) |
| how do u classify igneous rocks? | based on mineral composition and crystal structure and texture |
| what is instrusive? | forms when magma cools inside the earth |
| what are the 2 main categories of igneous rock? | instrusive and extrusive |
| what is an example of instrusive rock? | granite |
| what is exstrusive rock? | formed from lava |
| what are the 4 types of texture of igneous rock? | glassy, fine-grained, course-grained, porphyritic |
| example of glassy igneous | obsidian |
| example of fine-grained igneous | basalt |
| example of course-grained igneous | granite |
| example of porphyritic igneous | trachyte |
| example of extrusive rock | obsidian |
| what are fine-grained rocks made of? | interlocking mineral crystals |
| what are course-grained igneous rocks made of? | interlocking mineral crystals that are the same size |
| what are porphyritic igneous rocks made of? | large crystals scattered on a background of smaller crystals |
| what are sedimentary rocks made of? | particles that have been carried along and deposited by wind and water (sediments) |
| what are clastic rocks? | sedimentary rocks made from previously existing rocks |
| how are clastic rocks classified? | by size and shape of the particles in them |
| what is a conglomerate? | a clastic rock that has pebbles as at least one third of it |
| what are conglomerates sometimes called? | puddingstones |
| what are sandstones? | clastic rocks made from small, sand-sized pieces |
| how are sandstones formed? | from sand on beaches, riverbeds, and sand-dunes cementing together by minerals that harden in small spaces/pores between the grains |
| what is shale? | clastic rocks made of particles smaller than sand |
| how is shale formed? | from small particles of mud and clay that settle to the bottom of quiet bodies of water |
| how do organic rocks form? | from either directly or indirectly from material that was once living |
| example of organic rock | limestone |
| how are reefs formed? | many animals with limestone shells live together. they cement their shells together and overtime form these large structures |
| what is chalk? | a type of fine-grained limestone composed of microscopic shells, small fragments of shells, and calcite crystals |
| how are chemical rocks formed? | formed when a sea or lake dries up, leaving laarge amonts of minerals that were dissolved in the water |
| example of chemical rock | rock salt and gypsum |
| how is metamorphic rock formed? | when chemical reactions, tremendous heat, and/or great pressure change existing rocks into new kinds of rocks |
| what does morph mean? | form |
| what does meta mean? | change |
| what can metamorphic rocks be formed from? | igneous, sedimentary, or metamorphic |
Created by:
lillmissbossy
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