Science 1092 self-test

A true mineral has a specific ... structure

crystalline

To make them ready for use, ... usually require cutting and polishing

gemstones

Each crystal of a mineral has a definite ... shape that helps identify it

geometric

A mineral's ... it its resistance to being scratched

hardness

To be a true mineral, a substance must be ... occurring; it cannot be man-made

naturally

Mineralogist have identified over ... different minerals

4,000

.... means the metal can be drawn into a wire; ... means the metal can be hammered into thin sheets and different shapes

Ductile, malleable

... is the most widely used metal today

Iron

... mining is mining a mineral seam near Earth's surface

Strip

About 200 minerals are so common and compose so much of Earth's crust that they are called ... minerals

rock-forming

... is a hard, black, brittle coal that burn hotly with almost no smoke

Anthracite

... is the largest by-product from coal heated in an airtight oven

Coke

... are used by industry for drilling, cutting, grinding, or polishing hard substances

Diamonds

... refers to the light-reflective qualities of a mineral's surface and is another characteristics used to identify a mineral

Luster

... combined with others elements form compounds known as ores

Metals

... is the process used to remove mineral resources from Earth

Open-pit

With the acid test, a drop of weak acid will ... when it comes in contact with a carbonate mineral

bubble

There are eight main mineral classes based on ... composition-the fifth property of a true mineral

chemical

Usually the first characteristics that a mineralogist will test to identify a mineral is it ...

color

Metals have a distinguishing metallic luster, are good ... of heat and electricity, and are tough, ductile, and malleable

conductors

Spefic gravity is the comparison of the ... of a a given substance with the density of water

density

The ..., listed as number 10 on the hardness scale, is the hardest of all minerals

diamond

True minerals are ... substances; they are neither plant nor animal nor formed from or by anything that was once alive

inorganic

Coal, petroleum, and natural gas are not true ... because they are organic in origin, but some references classify them as mineral fuel

minerals

Mineral resources and ... are concentrated in relatively small areas scattered around the world

minerals

Digging machines remove ore from the surface of a large open hole in the ground in ... mining

open-pit

A ... mineral is identified by using a Geiger counter

organic

In ... mining,dense minerals can be separated from the surronding soil by washing away the lighter soil, leaving the heavy minerals behind

placer

During and after the Flood, heat and pressure from the overlying sediment changed the ... remains into coal

plant

Bible truths must be ... understood, and personalized before we can profit from the priniciples presented

read

Most minerals, especially metals, must be put through special ... process to remove impurities

refining

Ores found in the ... of rocks are called veins

seams

Four things that determine the value of a cut and polished diamond are ... purity, color, and quality of cut

size

A true mineral is a ... at standard temperature and pressure

solid

The ... of a mineral is the color of its powder and is generally more reliable than the actual color of the mineral because less color variations is present

streak

The practically and method of mining depend upon the location and ... of mineral to be mined

type

The mining method called dredging involves digging up sand that contains metals or others minerals from underneath ...

water

Cleavage, or the way a mineral ... is another characteristics that helps identify a mineral

splits

... metals can be combined with other metals to produce alloys with greater strenght, or hardness

Pure