C1.3 Metals and Their Uses

Question 1

where are metals found?

Answer 1

in the Earth’s crust

Question 2

what is a metal ore?

Answer 2

a rock with the metal compund or metal in it

Question 3

If it is worth extracting a particular metal depends on:

Answer 3

how easy it is to extract from it’s ore and how much metal the ore contains

Question 4

Name some metals that are found in their natural state

Answer 4

gold and silver (they’re unreactive)

Question 5

What does the way you extract a metal depend on?

Answer 5

it’s position in the reactivity series

Question 6

What element can you use for extracting copper, lead and iron?

Answer 6

carbon

Question 7

metal oxide+carbon=

Answer 7

metal+carbon dioxide

Question 8

How are elements above carbon extracted?

Answer 8

electrolysis

Question 9

Where do you extract iron from it’s ore?

Answer 9

a blast furnace

Question 10

iron oxide+carbon=

Answer 10

iron+carbon dioxide

Question 11

Uses of iron from the blast furnace

Answer 11

contains impurities, makes it brittle. when molten used as cast iron

Question 12

What is an alloy?

Answer 12

a metal mixed with another metal

Question 13

What is an alloy of iron?

Answer 13

steel

Question 14

Advantage of high-alloy steels

Answer 14

does not rust

Question 15

What are titanium and aluminium used for?

Answer 15

making of an aeroplane

Question 16

Properties of aluminium and titanium

Answer 16

not corrosive, strong, low density

Question 17

Properties of aluminium

Answer 17

silvery, shiny, light, low density, good conductor of energy and electricity, malleable and ductile, not corrosive,

Question 18

Uses of aluminium

Answer 18

drinks cans, cooking foil, saucepans, bicycles, aeroplanes

Question 19

Properties of titanium

Answer 19

silvery-white, very strong, resistant to corrosion, high melting point

Question 20

Uses of titanium

Answer 20

parts of jet engines, hip joints, nuclear reactors

Question 21

What element do you use to extract titanium

Answer 21

sodium or magnesium

Question 22

What is copper extracted from?

Answer 22

copper-rich ores

Question 23

How to extract copper

Answer 23

smelting or use of sulphuric acid

Question 24

How do you extract copper from low-grade ores?

Answer 24

bioleaching or phytomining

Question 25

Properties of the transition metals

Answer 25

good conductors, strong and malleable

Question 26

copper+tin

Answer 26

bronze

Question 27

copper +zinc

Answer 27

brass

Question 28

Disadvantages to using metals in construction

Answer 28

iron and steel can rust, extracting metals can damage environment, more expensive

Question 29

Advantages to using metals in construction

Answer 29

good electrical conductor, malleable, corrosion resistant