The ability of a metal to be bent, molded, and stretched is termed ________.\" t

Question

The ability of a metal to be bent, molded, and stretched is termed ________."

tempering

cold working

malleability

dexterity

1 points   

QUESTION 2

The high electrical conductivity associated with metallic bonds results from ________.

the ability of outer electrons to move freely from atom to atom

their radioactive instability

the ability of nuclei to be discharged into the atmosphere

their relatively great atomic mass

1 points   

QUESTION 3

Most of the metals currently in commercial use ________.

were known to the ancients

are found only in North America and Asia

were discovered in the last two centuries

are excavated as native metals and do not require smelting

1 points   

QUESTION 4

"Stone used for buildings, chemicals in fertilizers, and sand used to make glass are all examples of mineral resources known as ________."

tailings

industrial minerals

clinker

slag

1 points   

QUESTION 5

In what kind of terrain would you expect to find a placer deposit?

a dry lake bed

a mountain peak

the ocean floor

a streambed

1 points   

QUESTION 6

In what types of rocks are ore minerals found?

only in igneous rocks

only igneous and sedimentary rocks

only in igneous and metamorphic rocks

"in igneous, sedimentary, and metamorphic rocks"

1 points   

QUESTION 7

Which of these is true about mineral resources?

They are renewable because they are naturally formed

They are renewable because we use them at slower rates than they are formed

They are nonrenewable because they are formed at slower rates than we use them.

They are nonrenewable because they are no longer formed.

1 points   

QUESTION 8

Which of these statements about the U.S. supply of strategically important metals is true?

The United States has ample domestic supplies of strategic minerals

The United States imports a small amount of some strategic minerals.

The United States has access to abundant supplies of strategic minerals with its open trade partners.

The United States imports 100% of many strategic minerals

1 points   

QUESTION 9

A drawback to mining sulfides is the risk of ________.

underground fires

acid mine runoff

tunnel collapse

rock bursts

1 points   

QUESTION 10

Acid mine runoff results from the oxidation and the dissolution of ________ ores.

sulfide

oxide

carbonate

manganese

tempering

cold working

malleability

dexterity

Explanation / Answer

1) malleability

it is the property of a metal to deform under pressure. they can be convert as sheets by applying high pressure they will not break and form sheet structure.

2)the ability of outer electrons to move freely from atom to atom

electricity is the flow of electrons, electrical conductivity of a material depends on the available electrons which are capable to move freely from one atom to other.

3)were discovered in the last two centuries.

scientific field had a great growth with in the last two hundred years, and that reulted in every field of science, most of the metals we use commercially were also discovered with in the last two centuries.

4) industrial minerals

industrial minerals are the materials which naturally or synthetically processed, and use widely in industrial and domestic applications.

5) a streambed

a streambed is the bottom of a stream, or river, the amount of water flow will alter the streambed, and also the erosion and and deposition of sediments and minerals are depends on the water flow.

6) in igneous, sedimentary, and metamorphic rocks.

igneous rock is known as the primary rock, because other two rocks, sedimentary and metamorphic rocks also formed from igneous, so the mineral content of these rocks are common, and similar ore minerals can be seen in these rock units.

7)They are nonrenewable because they are formed at slower rates than we use them.

minerals also considered as nonrenewable, because they take thousands of years to form, it is beyond the life span of generations. so if it use at higher rate its amount decreases considerably.

8) united state imports 100% of many strategic minerals.

strategic minerals are very critical in supply around the world, like tin, cobalt, zinc, manganese,titanium and platinum etc, they are also very short in United state.

9) acid mine runoff

it is the outflow of acidic water from the mining site mainly due to the oxidation of iron sulfide.

10)sulfide

acid mine run off results mailnly from the oxidation of iron sulfide and mixing of this with water

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