10 October 2010<br />4.4 Metals for the future<br />Using your  periodic table, identify:<br />5 metal<br />5 non-metals<b...
Chapter 4: What’s in a reaction<br />%<br />Level<br />Student target<br />Teacher Comment<br />
Learn about<br />What metals are like and what they are used for<br />Why mercury is a hazardous metal<br />What risk asse...
Heavy metal<br />People have been using different metals for centuries. Gold was the first metal to be used<br />Pure gold...
Metallurgy<br />A scientist who works with metals is called a metallurgist<br />In the sixteenth century, Georg Agricola w...
Uses of metals<br />Metals are used for many different things<br />You find them at home, school, in factories, in shops a...
Properties of metals<br />
Popular metals<br />
A special metal<br />Most metals are solid at room temperature<br />Mercury (Hg) is the exception – at room temperature it...
Risk assessments<br />Some people want to ban mercury because it Is very toxic<br />If you breather in mercury or eat it i...
Risky business<br />The US EPA has announced plans to regulate the amount of mercury released in to the atmosphere from co...
Questions<br />What does a metallurgist do? (4)<br />Describe the properties of metals. (5)<br />The photos show objects m...
Questions<br />Choose the best metal for each object from the table of popular metals (6)<br />Give a reason for your choi...
Questions<br />Some farmers keep cows in fields close to coal-burning power stations<br />Explain why the grass, cows and ...
How to do experiments safely<br />Clear desk and place on your stool under the desk<br />No sitting down during practicals...
Using a Bunsen burner<br />Collect equipment, share between group<br />Examine equipment to see if there is any damage<br ...
Hot oven<br />Your oven at home is made from metals, but which metals are the best for the job? Metals for ovens have to p...
Workstation 1<br />Looking at appearance<br />Look at the samples of metals at workstation 1. Write down observations abou...
test tube holder<br />small amount of metal<br />test tube<br />Heat<br />Workstation 2<br />Effect of heat<br />At workst...
Workstation 3<br />Electrical conductivity<br />Test the metals with the conductivity tester at workstation 3. Write down ...
Presenting results<br />Design a table to show what you found out for each metal<br />
Considering your evidence<br />Discuss your findings in your group.<br />1	What properties do all metals have in common?<b...
Evaluation<br />When you carried out the tests, how did you make sure that the tests gave a fair comparison between the me...
And finally…<br />Name five metals<br />Name five non-metals<br />(use your periodic table)<br />
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4.4 Metals for the future

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4.4 Metals for the future

  1. 1. 10 October 2010<br />4.4 Metals for the future<br />Using your periodic table, identify:<br />5 metal<br />5 non-metals<br />2 semi-metals<br />
  2. 2.
  3. 3. Chapter 4: What’s in a reaction<br />%<br />Level<br />Student target<br />Teacher Comment<br />
  4. 4. Learn about<br />What metals are like and what they are used for<br />Why mercury is a hazardous metal<br />What risk assessments are and why scientists do them<br />
  5. 5.
  6. 6. Heavy metal<br />People have been using different metals for centuries. Gold was the first metal to be used<br />Pure gold occurs naturally<br />Some gold has been found in caves in Spain that was used about 42 000 years ago<br />
  7. 7. Metallurgy<br />A scientist who works with metals is called a metallurgist<br />In the sixteenth century, Georg Agricola wrote a book called De re metallica (on the nature of metals) about the science and extraction of metals<br />Agricola has been called the ‘father of metallurgy’<br />Today, metallurgy is an important field in science, which can lead to a whole range of careers<br />
  8. 8. Uses of metals<br />Metals are used for many different things<br />You find them at home, school, in factories, in shops and on the roads<br />It is hard to think of a place where we don’t find metals<br />Metals are used so much because they are good at doing many things<br />A lot of the metal objects we use are made of pure metal<br />
  9. 9. Properties of metals<br />
  10. 10. Popular metals<br />
  11. 11. A special metal<br />Most metals are solid at room temperature<br />Mercury (Hg) is the exception – at room temperature it is a liquid<br />It melts at -39 oC<br />Most metals melt at very high temperatures – Tungsten (W) melts at 3000 oC<br />
  12. 12.
  13. 13. Risk assessments<br />Some people want to ban mercury because it Is very toxic<br />If you breather in mercury or eat it it can cause breathing difficulties, hallucinations, memory loss or even death<br />Scientists who use mercury have to carry out a risk assessment<br />This means they use information about the hazards to reduce the risk to human health<br />
  14. 14. Risky business<br />The US EPA has announced plans to regulate the amount of mercury released in to the atmosphere from coal-fired power stations<br />The problem is that mercury gets into the sea, and then into seafood<br />When humans east seafood, they absorb the poisonous mercury<br />Mercury levels are monitored in the air, seawater, seafood and humans<br />
  15. 15. Questions<br />What does a metallurgist do? (4)<br />Describe the properties of metals. (5)<br />The photos show objects made from different metals<br />Choose the best metal for each object from the table of popular metals (6)<br />Give a reason for your choice (6)<br />
  16. 16. Questions<br />Choose the best metal for each object from the table of popular metals (6)<br />Give a reason for your choice (6)<br />
  17. 17. Questions<br />Some farmers keep cows in fields close to coal-burning power stations<br />Explain why the grass, cows and their mile should be monitored for mercury levels (7)<br />Suggest control measures that the government could use (7)<br />
  18. 18. How to do experiments safely<br />Clear desk and place on your stool under the desk<br />No sitting down during practicals<br />Collect and wear safety gear at all times<br />One way system to reduce accidents<br />Walk, don’t run<br />Ask if you are ever unsure!<br />
  19. 19. Using a Bunsen burner<br />Collect equipment, share between group<br />Examine equipment to see if there is any damage<br />Check gas tap is working and connect<br />Close air hole to ensure safety flame<br />Leave on safety flame when not heating<br />Heat on purple flame only<br />Pack away while you wait<br />Equipment will be hot, leave to cool down<br />
  20. 20.
  21. 21. Hot oven<br />Your oven at home is made from metals, but which metals are the best for the job? Metals for ovens have to put up with very high temperatures AND the wires that work the electrical parts (like the light and the fan) need to conduct electricity well. Which metals are best for the job? You need to find out!<br />
  22. 22. Workstation 1<br />Looking at appearance<br />Look at the samples of metals at workstation 1. Write down observations about the appearance of each metal.<br />
  23. 23. test tube holder<br />small amount of metal<br />test tube<br />Heat<br />Workstation 2<br />Effect of heat<br />At workstation 2 put a small amount of one metal in the bottom of a test tube. Place the test tube in a holder and heat the metal over the Bunsen burner for a few seconds. Write down what you see. Repeat the experiment for the other metals.<br />
  24. 24. Workstation 3<br />Electrical conductivity<br />Test the metals with the conductivity tester at workstation 3. Write down what you find out.<br />
  25. 25. Presenting results<br />Design a table to show what you found out for each metal<br />
  26. 26. Considering your evidence<br />Discuss your findings in your group.<br />1 What properties do all metals have in common?<br />2 Which metals behave differently to the others?<br />3 What happens when metals are heated? What can you say about the melting points of the metals you tested?<br />4 Which metals would be good for making the different parts of an oven?<br />5 What extra information do you need to find out to make sure that the metals you choose are going to be the right ones to use in an oven?<br />
  27. 27. Evaluation<br />When you carried out the tests, how did you make sure that the tests gave a fair comparison between the metals? How could you improve the tests?<br />
  28. 28. And finally…<br />Name five metals<br />Name five non-metals<br />(use your periodic table)<br />

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