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18 Cards in this Set
- Front
- Back
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________ solid crystals that occur naturally and have a definite chemical composition.
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Minerals
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Mining has three types of resources:
1 2 3 |
1. metals
2. nonmetals 3. fossil fuels |
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_____ are the most important type of mineral.
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Metals
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Why are metals so important?
1 2 3 4 |
1. shiny
2. malleable - can be hammered 3. ductile - turn to wire 4. conductibility- electricity |
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____ -____ was the first metalworker.
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Tubal-Cain
descendant of Cain |
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History has been divided into three periods based on man's skills with metals.
1 2 3 |
1. Stone/Copper Age
2. Bronze Age 3. Iron Age |
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There are three types of metals:
1 2 3 |
1. precious metals
2. common metals 3. alloys-combined metals |
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Some precious metals are ___, ___ and ____.
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gold, silver and platinum
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Some common metals are __,___, and ___.
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copper, lead and iron
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An _____ is a mineral composed of several different elements.
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ore
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___ is the most common metal - found in an ore combined with sulfur.
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Lead
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The second most common metal on earth is ___.
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aluminum
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Aluminum is found in the ore, ________.
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bauxite
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Why is aluminum an ideal metal for cars and other machines?
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Because it is lightweight and does not rust.
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The first useful alloy made was ______ - made from copper and tin.
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bronze
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Romans learned to made ____ by combining copper and zinc.
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brass
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____ is the world's most important alloy.
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Steel
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Steel is an alloy made from ___ and ______.
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iron and carbon
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