Learning Objectives

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Learning Objectives
C1a 2
This PowerPoint file contains some Learning
Objectives for this topic in the AQA
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Chapters 4, 6, 7 and 21 AQA Topic C1a 2
2
Rocks and metals Chapter 6 You should
learn

• Ores contain enough metal to make it economical
  to extract the metal and this changes over time
• Metals less reactive than carbon, can be
  extracted from their oxides by reduction with
  carbon.

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Rocks and metals Chapter 6/21 You
should learn

• Iron oxide is reduced using carbon in the blast
  furnace
• Iron from the blast furnace contains 90 iron.
  The other impurities present make the iron
  brittle, this limits its use
• The arrangement of the atoms in pure iron
  explains why iron is soft.

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Rocks and metals Chapter 6/21 You
should learn

• Most iron is converted into steel
• Steels are alloys (mixtures of iron, carbon and
  other metals)
• Alloys have structures which relate to specific
  uses
• Low carbon, high carbon and stainless steels have
  different properties.

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Rocks and metals Chapter 6/21 You
should learn

• Many metals in everyday use are alloys
• Metals such as gold, copper and aluminium which
  are too soft for many uses, may be alloyed to
  make them harder
• Smart alloys can return to their original shape
  after being deformed.

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Rocks and metals Chapter 4 You
should learn

• The elements in the central block of the periodic
  table are called the Transition metals
• Transition metals have the properties typical of
  other metals. They are good conductors of heat
  and electricity and may be bent or hammered into
  shape.

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Rocks and metals Chapter 4/7
You should learn

• The properties of copper make it useful for
  electrical wiring and plumbing
• Copper is extracted by electrolysis
• The supply of copper rich ores is limited.

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Rocks and metals Chapter 4/7
You should learn

• New ways of extracting copper from low-grade ores
  are being researched to limit the environmental
  impact of traditional mining.

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Rocks and metals chapter 21/7 You
should learn

• Aluminium and titanium have a low density and are
  resistant to corrosion. This makes them useful
  for specific purposes
• Aluminium and titanium cannot be extracted from
  their oxides using carbon. Current methods of
  extracting these metals are also expensive.

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Rocks and metals Chapter 21/7 You
should learn

• We should recycle metals because extracting them
  is using up our limited resources
• Extracting metals is also expensive in terms of
  the energy required in the process and the
  effects on the environment.

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