Extraction of Metals Worksheet

When metals are discovered in nature they are not generally found as a pure metal, but as part of a compound. This is because, over a very long period of time, the metal has reacted with oxygen in the air and reacted with water.

When metals are found in this state they are called ores.

Copper ore

An example of an ore containing copper

The less reactive metals, such as gold and platinum, are found as a pure metal, because they are very unreactive. All other metals have to be removed from their ores

Panning for gold

Panning for gold.

Unreactive metals are easily removed from their ores. However, the more reactive the metal the more difficult it is to remove.

Shown below is a table of what process must be undertaken to remove metals from their ores:

The unreactive metals are removed form their ores simply by heating. Metals such as zinc, nickel, tin, lead and copper need to be heated with carbon (or carbon monoxide) to extract them. The more reactive metals require electrolysis (a technique involving electricity) to achieve this. Iron, however, is removed in a blast furnace, like the one below:

Let's find out more about metals and their extraction.

What term is used to describe the state in which a reactive metal is found in nature?

ore

element

pure

Which of the following metals is found as a pure metal?

iron

sodium

gold

zinc

Complete the following sentence by typing the name of the missing metals into the text box below.

___________ is the only metal to be extracted from its ore in a blast furnace.

Electrolysis is a technique that involves using electricity to separate compounds.

Which of the following metals is most likely to be extracted from its ore using this technique?

gold

copper

zinc

aluminium

Match each of the metals shown to the correct method used to extract them form their ores.

Column A	Column B
copper	blast furnace
tin	heat with carbon
lithium	electrolysis
iron	heat with carbon
silver	heat alone

Match each of the metals shown to the correct method used to extract them form their ores.

Column A	Column B
zinc	heat with carbon
potassium	electrolysis
magnesium	electrolysis
lead	heat with carbon
mercury	heat alone

Complete the following sentence by typing the correct name of the missing element in the box below:

Metals over a long period time have reacted with ____________ from the air.

Which two of following substances have reactive metals reacted with over many years to form ores?

water

chlorine

methane

oxygen

ANSWERS

Question 1

What term is used to describe the state in which a reactive metal is found in nature?

CORRECT ANSWER

ore

EDDIE SAYS

More reactive metals are discovered in ores and must be extracted from these ores before they can be used.

ANSWERS

Question 2

Which of the following metals is found as a pure metal?

CORRECT ANSWER

gold

EDDIE SAYS

Gold is discovered as a pure metal because it is unreactive.

ANSWERS

Question 3

Complete the following sentence by typing the name of the missing metals into the text box below.

___________ is the only metal to be extracted from its ore in a blast furnace.

CORRECT ANSWER

iron

EDDIE SAYS

Iron is the only metal that is extracted in a blast furnace. The temperatures in the blast furnace are so high that the iron produced is in the molten state.

ANSWERS

Question 4

Electrolysis is a technique that involves using electricity to separate compounds.

Which of the following metals is most likely to be extracted from its ore using this technique?

CORRECT ANSWER

aluminium

EDDIE SAYS

Aluminium is extracted from its ore using electrolysis because it is a fairly reactive metal.

ANSWERS

Question 5

Match each of the metals shown to the correct method used to extract them form their ores.

CORRECT ANSWER

Column A	Column B
copper	heat with carbon
tin	heat with carbon
lithium	electrolysis
iron	blast furnace
silver	heat alone

EDDIE SAYS

The reactivity series is important to learn to allow you to easily answer this question.

ANSWERS

Question 6

Match each of the metals shown to the correct method used to extract them form their ores.

CORRECT ANSWER

Column A	Column B
zinc	heat with carbon
potassium	electrolysis
magnesium	electrolysis
lead	heat with carbon
mercury	heat alone

EDDIE SAYS

The relationship between each metal and its reactivity helps you to make sense of the method that's needed to extract them. When you understand that highly reactive metals like magnesium are going to need an electric current running through them to extract them from their ores, it makes sense that something like copper, which is only moderately reactive, is much easier to extract using something higher in the reactivity series, like carbon.

ANSWERS

Question 7

Complete the following sentence by typing the correct name of the missing element in the box below:

Metals over a long period time have reacted with ____________ from the air.

CORRECT ANSWER

oxygen

EDDIE SAYS

Metals react with oxygen from the air to form oxides. That means that most metal ores are different forms of oxides or similar compounds. For many, take away the oxygen and the metal is left - easy!

ANSWERS

Question 8

Which two of following substances have reactive metals reacted with over many years to form ores?

CORRECT ANSWER

water
oxygen

EDDIE SAYS

Metals reacted with oxygen and water over time to end up with the ores we know today. Visit a county like Devon, with its red soils, and you'll see iron ore (iron oxide) right there: the iron has combined with oxygen and forms much of the structure of the land.