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Ch 7/8 Test Review

QuestionAnswer
Why are gems so much more valuable than other minerals? They are rare, and can be cut and polished.
What is the Mohs scale? A scale classifying minerals according to hardness.
Explain in 3 steps how a metamorphic rock could turn into a sedimentary rock and then back into a metamorphic rock. 1. Erodes into sediment. 2. Compacts and cements into sedimentary rock. 3. Is squeezed and heated into metamorphic rock.
What does the size of mineral crystals in igneous rock depend on? How fast the magma cooled.
What types of rock can be broken into fragments to form new sedimentary rock? Igneous, metamorphic, and sedimentary.
What are some facts about minerals? They have luster, cleavage/fracture, an atomic structure, are inorganic, solid, and found in nature.
Explain what can happen to igneous rock in the rock cycle. It can be eroded into sediment, melted, or put under heat and pressure.
Explain what can happen to metamorphic rock in the rock cycle. It can be eroded into sediment or melted.
Explain what can happen to sedimentary rock in the rock cycle. It can be weathered and eroded into sediment, melted, or put under heat and pressure.
What does the word metamorphic mean? Change of form.
What does the rock cycle show? That rocks are on a continuous journey.
What are rocks called that are produced when magma or lava cools and hardens. Igneous rock.
How do rocks get classified as igneous, sedimentary, or metamorphic? By how they were formed.
What properties are commonly used to identify minerals? Streak, hardness, cleavage/fracture, color, and luster.
What are some examples of fossil fuels? Coal, oil, and natural gas.
What is the most abundant fossil fuel? Coal
What do we call an amount of fossil fuel that can be extracted at a profit using current technology? Reserve
What is a thick, black liquid formed from the buried remains of microscopic marine organisms called? Oil
What is the process called that removes unwanted elements from metals? Smelting
A rare mineral that can be cut and polished, giving it a beautiful appearance. Gem
A model that shows how rocks are recycled from one type to another. The rock cycle.
A naturally occurring, inorganic solid with a definite structure and composition. Mineral
These are classified as igneous, sedimentary, and metamorphic. Rocks
A mineral that contains something that can be useful and sold after processing. Ore
Rocks that form when magma or lava cools. Igneous
Rocks formed when older rocks are heated and or squeezed. Metamorphic
Solid that has a repeating pattern of atoms. Crystal
Remains or trace of a once-living plant or animal. Fossil
Rocks formed when pieces of rocks, plant and animal matter, or dissolved minerals gather into layers. Sedimentary
Created by: rwaters
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