Metals And Their Uses

Question 1

The earths crust contains many naturally occurring elements and compounds called what?

Answer 1

Minerals.

Question 2

What is a mineral?

Answer 2

A naturally occurring chemical element or compounds that are not chemical combined.

Question 3

What is a metal ore?

Answer 3

A naturally occurring mineral, from which it is economically viable to extract.

Question 4

The earths crust contains many naturally occurring elements and compounds called what?

Answer 4

Minerals.

Question 5

What is a mineral?

Answer 5

A naturally occurring chemical element or compounds that are not chemical combined.

Question 6

What is a metal ore?

Answer 6

A naturally occurring mineral, from which it is economically viable to extract.

Question 7

What is the earth crust made out of?

Answer 7

Compounds and elements called minerals.

Question 8

A metal ore is a?

Answer 8

A mineral which contains enough metal to make it economically viable to extract it.

Question 9

The method of metal extraction depends on what?

Answer 9

How reactive the metal is.

Question 10

How can gold be extracted?

Answer 10

Through panning.

Question 11

Most metals are found as what?

Answer 11

Metal oxides or compounds that are easily changed to metal oxides.

Question 12

Metals that are less reactive than carbon can be extracted from…?

Answer 12

Their oxides by heating with carbon.

Question 13

Metals more reactive than carbon are extracted using…?

Answer 13

Electrolysis of molton compounds .

Question 14

Copper does not react with what?

Answer 14

Water.

Question 15

How can copper be extracted by…?

Answer 15

From copper rich ores by heating the ores in a furnace (smelting).

Question 16

Copper can be purified by doing what?

Answer 16

Electrolysis.

Question 17

What happens during electrolysis in copper?

Answer 17

The positive copper ions move towards the negative electode and form pure copper metal.

Question 18

What is phytomining?

Answer 18

An extraction method that uses plants to extract copper.

Question 19

What is bioleaching?

Answer 19

An extraction method tgar uses bacteria to extract metals from low-grade ores.

Question 20

What is a low grade ore?

Answer 20

Ores that contain small amounts of a subtance.

Question 21

Molton Iron contains roughly …% iron?

Answer 21

96%

Question 22

Molton Iron contains roughly …% Carbon and other metals?

Answer 22

4%

Question 23

To produce pure iron all the …. have to be removed.

Answer 23

Impurities.

Question 24

How are atoms in iron arranged?

Answer 24

In layers that can slide easily and be malleable.

Question 25

Iron can be mixed with other metals to make what?

Answer 25

Steel.

Question 26

Steel is a ….?

Answer 26

Alloy.

Question 27

What is a alloy?

Answer 27

A mixture of two or more metals, or a mixture of one metal and a non-metal.

Question 28

Steel with high carbon content is…?

Answer 28

Hard and strong

Question 29

Steel with low carbon carbon content is..?

Answer 29

Soft and easily shaped.

Question 30

Stainless steel is…?

Answer 30

Hard and resistant to corrosion.

Question 31

Transition metals are in what group in the periodic table?

Answer 31

2 and 3

Question 32

Transition metals are …. conductors of heat and electricity?

Answer 32

Good

Question 33

Transition metals have a ….. melting point.

Answer 33

High,

Question 34

How are titanium and aluminium extracted from its ores?

Answer 34

Electrolysis