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© Boardworks Ltd 20051 of 17 Resistant Materials Metals These icons indicate that teacher’s notes or useful web addresses are available in the Notes Page. This icon indicates that the slide contains activities created in Flash. These activities are not editable. For more detailed instructions, see the Getting Started presentation. © Boardworks Ltd 2005 1 of 17
© Boardworks Ltd 20052 of 17 Learning objectives © Boardworks Ltd 20052 of 17 Learning objectives To know where metals come from and how they are obtained. To understand the differences between, and properties of, ferrous and non-ferrous metals and alloys. To understand how the properties of different metals make them suitable for different uses. To know how the properties of metals can be altered by heating.
© Boardworks Ltd 20053 of 17 Metals are part of the earth’s crust. Economic, chemical and technological problems have to be solved to obtain them. How desirable a metal is often depends on how scarce it is. Gold diggers dig up tonnes to obtain a few grams, whereas there is so much iron that materials technologists are only interested if they can obtain hundreds of kilograms from each tonne of ore. Where do metals come from?
© Boardworks Ltd 20054 of 17 Copper ore is mined, then washed to remove other minerals and unwanted materials. It is heated in a furnace and the molten copper is run off. This process is known as smelting. Where do metals come from? Pure metals like copper form part of the earth’s crust as metal ore.
© Boardworks Ltd 20055 of 17 Extracting metals – smelting
© Boardworks Ltd 20056 of 17 Aluminium is the most plentiful metal found in the earth’s crust, and is in high demand because it is both light and strong. Aluminium is extracted from aluminium oxide (bauxite) by electrolysis. Electricity passes between the electrodes and pure aluminium forms at the cathode. Extracting metals – electrolysis molten aluminium metal cathode lining carbon anode
© Boardworks Ltd 20057 of 17 Ferrous metals are metals which contain iron. They will corrode if unprotected. Ferrous metals will be attracted by a magnet. Non-ferrous are metals which do not contain iron. Pure metals such as aluminium, copper, tin and lead are non- ferrous, and do not rust. Ferrous and non-ferrous metals Metals can be classified into three groups: ferrous metals, non-ferrous metals and alloys. Alloys are metals which are a mixture of two or more metals, benefiting from the properties of both. For example, brass is an alloy of copper and zinc.
© Boardworks Ltd 20058 of 17 Types of metals
© Boardworks Ltd 20059 of 17 Examples of ferrous metals
© Boardworks Ltd 200510 of 17 Non-ferrous metals
© Boardworks Ltd 200511 of 17 Examples of alloys
© Boardworks Ltd 200512 of 17 Random alloy generator
© Boardworks Ltd 200513 of 17 Heat treatment – annealing
© Boardworks Ltd 200514 of 17 Heat treatment – hardening steel
© Boardworks Ltd 200515 of 17 Heat treatment – tempering
© Boardworks Ltd 200516 of 17 Metals are commercially available in a range of stock shapes and sizes. Market forms of metals channel angle square tube round tube flat strip sheet round rod square rod hexagonal rod octagonal rod
© Boardworks Ltd 200517 of 17 Key points © Boardworks Ltd 200517 of 17 Key points Metals are extracted from the earth’s crust. Iron ore is smelted to obtain iron, while aluminium is obtained by electrolysis. Ferrous metals come from iron ore and include cast iron and steel. Non-ferrous metals include aluminium, copper and tin. Alloys such as brass and stainless steel are formed from two or more metals and other elements. Heating metals alters their properties. Annealing involves heating a metal and then allowing it to cool, which makes the metal more workable. Tempering steel makes it less brittle.
© Boardworks Ltd of 14 Topic 1.2 Metals What students need to learn Aesthetic, functional and mechanical properties, application and advantages/disadvantages.
Metals Unit 212/255 – Principles of Fabrication and Welding Technology.
Teacher’s notes included in the Notes Page. Flash activity. These activities are not editable. Useful websites for further information. Icons key: For.
Topic 3 Metals and their uses. Extracting metals Metals are found in the Earth’s crust They are often chemically combined with other elements – this is.
- To be able to select appropriate types of metal for different applications - To be able to explain why metals are suitable for these different applications.
What is an ore? Why do we have to use chemical reactions to extract most metals? What is the name given to the group of metals in the centre of the periodic.
Metals. Ferrous metals – contain iron Non-ferrous – contain no iron Alloys – a mixture of two or more metals.
Learning Intention: Show a working knowledge of various metals
Metals and Processes Theory. Knowledge and Understanding.
© Boardworks Ltd of of 11© Boardworks Ltd 2006 Are some metals easier to find than others? Finding metals.
Learning objective: demonstrate electrolysis as the decomposition of a molten salt by an electric current see patterns in the changes at the electrodes.
Types Of Metal. Pure metals -Single element metal -Mined from the ground -Natural metal -Examples -Copper, lead, aluminum, iron, tin, gold, silver, titanium,
Engineering Materials Resource 4 Manufacturing Techniques.
Week 1: Metals Using the books/internet find out about the following things using mind maps, notes, sketches or lists etc. Ferrous, non-ferrous, alloys.
Metals, Making Electricity and Corrosion. Metals The job that a metal is used for is determined by its physical and chemical properties. Physical properties.
Metal Properties and Processes Design and Manufacture.
Recycling and construction Name four different metals State a use for each one. Explain why that metal is suitable for that particular use. For example:
© Boardworks Ltd of 15 Resistant Materials Manufacturing Processes These icons indicate that teacher’s notes or useful web addresses are available.
Revision lesson. Metals found in the ground are normally found as a METAL ORE – combined with other elements in compounds Metals found on their own.
Extracting metals. Methods of extracting metals The Earth's crust contains metals and metal compounds such as gold, iron oxide and aluminium oxide, but.
INTRODUCTION OF MATERIAL SCIENCE (SFB 2013) NUR SUHADAH BINTI OTHMAN ( )
After completing this topic you should be able to : State ores are naturally occurring compounds of metals. State the less reactive metals, including.
Metal ores and mining Ores are naturally occurring rocks found in the Earth’s crust. They contain metal/metal compounds in sufficient amounts to make it.
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Earth and Mineral Resources Unit 2 Section B. Renewable and nonrenewable resources Renewable resources Can be replenished over relatively short time spans.
Chapter 17. Which metals were discovered earliest? Gold, copper, silver = less reactive metals Found “native” ie. as pure metal More reactive.
Ferrous Metals Non-ferrous Metals Alloys
Boardworks GCSE Science: Chemistry Extracting Metals
3.17 Uses of electrolysis Purification of copper: Impure copper extracted from its ore by heating the ore with carbon (smelting) – a mixture of copper.
Non Ferrous Metals. Aluminum Relatively new material Requires little energy to produce 10 kwh for each pound Ore is generally strip mined.
Metals can be either ferrous or non-ferrous. Ferrous metals contain iron while non-ferrous metals do not.Metals can be either ferrous or non-ferrous.
Do now! Can you stick the summary and word sheets in?
IGCSE CHEMISTRY SECTION 5 LESSON 1. Content The iGCSE Chemistry course Section 1 Principles of Chemistry Section 2 Chemistry of the Elements Section 3.
Mr. A Roberts GCSE Resistant Materials Materials and their Uses - Metal.
Summary : Rocks and metals Ores are compounds which contain enough metal to make it economic to extract the metal. Examples of ores include: Haematite.
UNIT 4 - MATERIALS METALS. INTRODUCTORY ACTIVITY LIST TEN METALLIC OBJECTS.
Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Unit 12 Identifying, Marking, Cutting, and Bending Metal.
Ferrous & Non-ferrous metals:
Types of Chemical Bond When atoms combine to achieve more stable structures, three types of bonding are possible –Ionic Bond – results when metallic.
Materials. Metal Metals are chemical elements that are good conductors of electricity and heat. Metals are extracted from mineral ores. Metals with high.
Chemicals and the Earth Lesson 3: Extraction of Metals.
Potassium Sodium Calcium Magnesium Aluminium Carbon Zinc Iron Copper Silver Gold More reactive 1.Complete the word equation: Copper oxide + sodium
UNIT 4: Ferrous and Non-Ferrous alloys Manufacturing Engineering Unit 4 Copyright © 2012 MDIS. All rights reserved. 1.
Types of Metals. What are the properties of a metal?
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