Question | Answer |
Igneous rock forms in regions where rock is _____ to melting point then cooled to a solid. | heated |
Sedimentary rocks can have layers of different colors; this _____ when different minerals are deposited at different times. | occur |
Sedimentary rocks will most likely _____ an environment where particles of rocks are accumulating. | form |
Igneous rocks form from the processes of _____ and solidification. | crystallization |
Metamorphic rocks form from the process of _____ pressure. | extreme |
Scientists classify rocks into the categories of igneous, metamorphic, and sedimentary based on their _____. | formation |
Metamorphic rock forms where any kind of rock is _____ by the extreme heat and pressure. | changed |
The presence of igneous rocks _____ be evidence of volcanos. | might |
A rock that has been formed as the result of liquid rock being ejected from a volcano is an _____ rock. | igneous |
Cementation is one of the _____ processes in the formation of sedimentary rock. | final |
The interlocking crystals on an igneous rock that helps classify it is that the crystals are a result of melted rock that has _____. | cooled |
The primary process that turns sediments into sedimentary rock is the upper _____ of sediment, pressing down on lower layers of deposited sediment. | layers |
Metamorphic rocks are different from igneous rock and sedimentary rocks in that metamorphic rocks form from _____ rock that has been changed. | existing |
Igneous rock and metamorphic rocks have similar formation, in that they both _____ extreme heat. | require |
One of the early steps in the formation of sedimentary rock is _____ of existing rock. | weathering |
Sedimentary rock can be changed into igneous rock if _____ are melted. | sediments |
Igneous rock can be changed into sedimentary rock when igneous rock are weathered and the _____ deposited. | fragments |
In order for a rock to be _____ as igneous, liquid rock must have changed its physical state during formation. | classified |
Igneous and sedimentary rocks could _____ be changed into metamorphic rock if they are changed by pressure. | each |
Geologists might recognize a metamorphic rock by _____, wavy layers because they were caused by pressure and heat. | distorted |
Sedimentary rock _____ be classified by using the evidence of being formed by melting rock. | cannot |
Sedimentary rocks often contain _____ layers because they are formed by the deposition of sediment. | horizontal |
The melting of rock deep underground is _____ one of the processes by which sedimentary rock is formed. | not |
Sedimentary rock can be changed into metamorphic rock if it is ______ to extreme heat underground. | exposed |
Fossils are found in ______ rock. | sedimentary |
Rock that is formed by _____ and layering of sediment that is pressed together is sedimentary rock. | erosion |
Igneous rock is formed from ______ or lava. | magma |
Gneiss rocks are metamorphic and are formed from _____. | granite |
Igneous rock that is formed from lava cooling _____ the Earth is extrusive igneous rock. | outside |
An example of an extrusive igneous rock is _____. | obsidian |
Igneous rock that is formed from magma cooling _____ the Earth is extrusive igneous rock. | inside |
A sedimentary rock that is formed by gravel and small pebbles is _____. | conglomerate |