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| "fire made" form when melted rock cools and hardens; granite, basalt |
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| form when sand, mud, and pebbles at the bottom of rivers, lakes, and oceans pile up; over time they press together and cement into solid rocks; limestone and siltstone |
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| rock that has changed form through squeezing and heating; marble and gnesis |
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| the process that crumbles, cracks, and breaks rocks; happens slowly over several years; can occur by water, wing, and temperature |
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| occurs when weathered materials are carried away; is a slow process |
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| is made of many different materials including rocks, minerals, and silt |
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| can be found in soil; it is a material that was once living or was formed by living things; it adds nutrients to the soil |
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| top layer of soil; made of very small, dark particles; has a lot of humus and minerals; it can also hold a lot of water |
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| found below the topsoil; made of bigger, lighter colored particles; lacks humus; hold water and some minerals |
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| kind of soil with clay and sand |
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| soil with grains of rock that are too small to see with your eyes alone |
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| the imprint or remains of something that lived long ago; teeth, bones, shells |
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| hardened tree sap; fossils can be found in amber |
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| shallow prints or marks in solid rock |
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| an empty space in rock where something once was |
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| a fossil made inside a mold; a copy of the mold's shape |
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