Gr.6 Science Chapter 3 Sec 3
Terms in this set (30)
any hard, colorful mineral that has a brilliant or glassy luster
a gemstone that has been cut and polished
examples of ways gems are used
in jewelry, mechanical parts, and for grinding and polishing
list 4 examples of metals
aluminum, copper, iron, silver
Why are metals useful?
they can be stretched, flattened, and molded into different shapes like wire, beams, or tools.
what are some uses of metals?
to make wire, metal sheets, and machine parts.
Talc can be found in what products?
Calcite can be found in what product?
quartz can be found in what product?
gypsum can be found in what product?
a rock that contains a metal or economically useful mineral
most metals occur in a pure form, TRUE OR FALSE
much of the world's copper is contained in the mineral ore called??
what do you call a person who searches for an ore deposit?
a prospector, like the fat guy with the axe in toy story
what features do geologists look for when they prospect for ores?
geologists look for rocks on the land surface and by studying maps of rocks beneath the surface. geologists also look for magnetic fields.
the map of an ore deposit helps miners decide how to mine the or, TRUE OR FALSE???
what kind of mine is used if the ore deposit starts near the surface and extends deep underground?
what kind of mine is used if the ore deposit occurs in veins?
what kind of mine is used if the ore deposit is exposed on the surface?
how are the ore deposits removed by shaft mining and by strip mining similar to the ore deposits removed in open pit mining?
Pit mining and shaft mining are similar because they are deep under ground. Strip mining and pit mining are similar because they are near the surface. this makes no sense.
describe strip mining
in strip mining earth moving equipment scrapes away soil to expose ore.
describe open pit mining
in open pit mining the miner uses a giant earth moving equipment to dig a tremendous pit and remove ore deposits.
describe a shaft mine
shaft mines have a network of tunnels that extend deep into the ground following the veins of ore
the process in which an ore is melted to separate the useful metal from other elements
people first developed smelting in the 1800s, TRUE OR FALSE?
false! developed in 1500s BC
a solid mixture of 2 or more metals
step 1 for smelting iron ore:
mix with limestone and coal
step 2 for smelting iron ore
place in blast furnace
step 3 for smelting iron ore
produce carbon dioxide and molten iron
step 4 for smelting iron ore
pour off molten iron