Study Questions: Introduction to Rock and the Rock Cycle
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The quiz about rock and the rock cycle will involve questions like the ones that follow.
Note: Whenever you see reference to Tarbuck, in the following questions, that means the eText of the textbook by Tarbuck and others, Earth
- In order to be considered a rock by a geologist, must a solid contain more than one type of mineral?
- In order to be considered a rock by a geologist, must a solid contain more than one mineral grain?
- In order to be considered a rock by a geologist, what must a solid be mostly or entirely composed of?
- What is the most important way, related to the manner in which it formed, that an igneous rock is different from other rock types?
- Does metamorphic rock form by cooling from an originally molten (melted, liquid) state?
- What is the name geologists use to describe layering in a metamorphic rock that develops as a result of stress?
- What is the name geologists use to describe layering in a sedimentary rock that represents ancient surfaces on which sediments were deposited or precipitated?
- What is the general type of igneous rock that forms below Earth's surface?
- What is the general type of igneous rock that forms at Earth's surface?
- What do we call sediment that is composed of broken or eroded particles of some pre-existing rock, minerals, or biological debris?
- What is a naturally occurring geological solid that is not of biologic origin and that is not a rock?
- What is a naturally occurring geological solid that is composed of the altered remains of plant material and that is not a rock?
- Sometimes gas bubbles are trapped within a cooling magma and are preserved in the resulting igneous rock. What are these holes in an igneous rock called?
- What are the two primary types of carbonate sedimentary rock?
- What is a sedimentary rock that is composed mostly or entirely of the mineral calcite?
- What is a sedimentary rock that is composed mostly or entirely of the mineral dolomite?
- List the four sizes of clastic sediments in order of decreasing grain size, listing the coarsest first. Hint, examine Figure 4.12.
- What is the characteristic of a rock that involves the size, shape, distribution, and boundary relationships among mineral grains in the rock?
- What kind of material is a siliciclastic sedimentary rock made of, that makes it different than a bioclastic rock?
- What kind of material is a volcaniclastic sedimentary rock made of, that makes it different than a bioclastic rock?
- What kind of material is a bioclastic sedimentary rock made of, that makes it different than a siliciclastic rock?
- What are three general ways that a rock with a crystalline texture can develop?
- What is an obvious difference between a clastic and crystalline texture?
- What is the name that geologists use for the original rock that underwent change to become a metamorphic rock?
- What is the minimum temperature at which metamorphism occurs?
- For a rock of a given composition, what is the maximum temperature under which metamorphic change occurs?
- What is the name geologists give to a kind of fracture frequently seen in glass or a fine-grained rock, where the broken face has curved parallel/concentric ribs that resemble the ribs on a mussel shell?
- Why is a piece of fresh uniform obsidian not considered a rock?
- Why is a piece of coal not considered a rock?
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