Metal Sources (Module 1-3)

Question 1

What element is the most abundant in earth’s crust?

Answer 1

Oxygen followed by Silicon

Question 2

What metal is the most abundant in the earth’s crust?

Answer 2

Aluminum followed by iron

Question 3

How many elements account for over 99% of the earth’s crust?

Answer 3

8 elements (O, Si, Al, Fe, Ca, Na, Mg, K)

Question 4

How many important metals are above 2% in the earth’s crust?

Answer 4

3 metals: Al (8.2%), Iron (5.6%), and Mg (2.3%)

Question 5

What are the two main sources of metals?

Answer 5

a. Mineral Ore

b. Recycled Materials

Question 6

It is a primary source of metals. It is naturally occuring inrorganic substance of definite compisition and crystal structure.

Answer 6

Mineral

Question 7

What are the two classifications of mineral?

Answer 7

a. Ore

b. Gangue Mineral (gangue)

Question 8

It is a mixture of mineral, one or more of which can be economically exploited to become a source or supply of a particular metal.

Answer 8

Ore

Question 9

These are minerals of no economic value.

Answer 9

Gangue Mineral

Question 10

Iron exists in minerals in what form?

Answer 10

Oxides

Question 11

Copper exists in minerals in what form?

Answer 11

Sulfides

Question 12

Aluminum exists in minerals in what form?

Answer 12

Oxide

Question 13

Nickel exists in minerals in what form?

Answer 13

Sulfide

Question 14

Titanium exists in minerals in what form?

Answer 14

Oxides

Question 15

Chromium exists in minerals in what form?

Answer 15

Oxide

Question 16

Lead exists in minerals in what form?

Answer 16

Sulfide

Question 17

What are the common gangue minerals?

Answer 17

a. Oxides (quartz, bauxite, limonite)
b. Carbonates (calcite, dolomite, siderite)
c. Sulfates (barite, gypsum)
d. Silicates (feldspar, garnet, rhodonite, chlorite, clay minerals)
e. Miscellaneous (rock matter, fluorite, pyrite, pyrrhotite)

Question 18

What are the classification of mineral deposits?

Answer 18

a. Ore Body/Deposit

b. Mineral Deposit

Question 19

This is a mineral deposit that is an aggregation of mineral that can be economically processed.

Answer 19

Ore Body/Deposit

Question 20

This is a mineral deposit that is an aggregation of minerals that cannot be economically processed.

Answer 20

Mineral Deposit

Question 21

These are secondary sources of metals and are recovered from scraps but have more concetrated and purer metals than primary ones.

Answer 21

Recycled Materials

Question 22

What are the three forms of scrap metal?

Answer 22

a. Home Scraps
b. Prompt Industrial Scraps
c. Obsolete Scraps

Question 23

These are scrap metals that are generated during the production of metals.

Answer 23

Home Scraps

Question 24

These are scrap metal generated during the manufacturing of metal articles.

Answer 24

Prompt Industrial Scraps

Question 25

These are metal scraps that are obtained from manufactured products which are no longer useful.

Answer 25

Obsolete Scraps

Question 26

T/F: Recycled materials have higher and simpler processing operations.

Answer 26

False. Recycled materials involved fewer and simpler processing operations.

Question 27

T/F: Recycled materials require more total energy.

Answer 27

False. Recycled materials require less total energy.

Question 28

T/F: Recycled materials produce less pollution.

Answer 28

True