• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Rocks and Metals - Rocks and the Earth

Extracts from this document...

Introduction

CD3 Rocks and Metals Rocks and the Earth There are 3 main types of rock . These are sedimentary , metamorphic and igneous . Igneous rocks are formed by molten lava escaping from the mantle and cooling down to form solid , crystalline rock. The faster the new rock cools the smaller the crystals in the rock are. Eg Granite Sedimentary rocks are made when small chippings of rock accumulate on the seabed and are crushed together over thousands of years. These chippings are worn from rocks by wind, rain and ice , this is called erosion or weathering. The chippings are carried to the sea by rivers and streams. Eg sandstone Metamorphic rocks are formed when high temperatures or pressures act on sedimentary or igneous rocks changing them. Eg marble The earth is made up of four main layers. The inner and outer cores are in the middle and are made of iron. Outside the core there is a layer of dense liquid rock called magma. ...read more.

Middle

5. Aluminium Al 6. Zinc Zn Zinc + Copper Sulphate Zinc Sulphate + Copper 7. Iron Fe 8. Lead Pb Zn + Cu SO4 ZnSO4 + Cu 9. Copper Cu 10. Silver Ag 11. Gold Au Making Metals from Ores Only the most unreactive metals like silver and gold are found in nature as pure metals. Most metals must be made from rocks which contain compounds of the metal. These special rocks are called ores. Many useful substances can be made from ores such as pottery , cement ,glass and most metals. Less reactive metals such as copper and iron can be made from the minerals in their ores by heating their ores with carbon or carbon monoxide gas. Eg Iron can be made from the mineral Haemetite by heating this with carbon monoxide gas. Iron oxide + Carbon Monoxide Iron + Carbon Dioxide FeO + CO Fe + CO2 Electolysis Reactive metals require a more powerful method to purify them from their ores . ...read more.

Conclusion

The casing is the cathode and liquid aluminium metal is formed there. Atoms , Molecules and Ions All matter is made up of tiny particles called atoms. These particles have no charge. A substance only made of one type of atom is called an element. When a chemical reaction occurs atoms bond together to make new particles called molecules. A compound is always made up of molecules. Some elements are made up of molecules. C Oxygen Oxygen Carbon dioxide Atom molecule molecule Structure of Atoms An atom is made up of two parts. In the centre there is a small , heavy lump with a positive charge called the nucleus. On the outside small light ,negatively charged particles called electron orbit around the nucleus. Nucleus (+ve) Electrons (-ve) An Atom Oxidation and Reduction When a substance reacts with oxygen this is called oxidation. When a substance has oxygen remove this is called reduction ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Changing Materials - The Earth and its Atmosphere section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Changing Materials - The Earth and its Atmosphere essays

  1. Peer reviewed

    What is a metal ore?

    4 star(s)

    However, cast iron is brittle, not very strong and prone to severe rusting. If we remove all of the impurities in cast iron we get wrought iron. However, wrought iron is very soft and is used only for decoration. If we take pure iron and add back controlled amounts of carbon we make steel - an alloy of iron.

  2. Investigating The Reactivity Of The Metals Iron, Magnesium, Zinc, Copper And Calcium And Their ...

    They give a reading to point nought of a degree. This shows again that calcium was the most reactive and cooper was the least reactive. They are accurate results and they show more accuracy than a normal thermometer. The results were repeated to give accurate results to show that the experiment was carried correctly and no mistake were made i.e.

  1. Investigate the factors that affect the mass of Copper deposited on the Copper Cathode ...

    solution, and this may have slightly affected the forming of copper atoms at the cathode. And finally another inaccuracy is that on one occasion, the crocodile clip holder slid into the solution, so the crocodile clip was exposed to the electrolyte.

  2. Investigating how the amount of copper affects the mass of the cathode

    I could have done much better. The variables that I had chosen to monitor where the time the electrodes where left in the solution for, and the size of the current applied in the solution. One way in which I could have improved this investigation is by using a larger

  1. Extraction of metals and Alloys.

    This reduces iron in the ore into iron metal. Iron then drops to the bottom as liquid iron and is 'tapped off' as needed. Properties and Uses of Iron Iron is a magnetic metal. Iron from a Blast Furnace contains around 5% carbon which comes from the coke in the furnace.

  2. Extraction of Metals.

    This uses a lot of energy, so highly reactive metals are the most expensive to extract. Therefore there is a link between a metal's place in the Reactivity series and how easy it is to extract. The more reactive a metal is, the more difficult it is to extract chemically from its ore.

  1. Investigating displacement reactions to find out the order of reactivity of some metals.

    anions, and the more energy will be released when the metal forms those bonds. Thus energy given out by the reaction is proportional to the bond strength. In a reaction such as Copper Sulphate and Zinc, the Zinc is more reactive than the Copper.

  2. Chemistry- Earth, its structure and atmosphere

    We know this is not the case. Wegener?s theory: Wegener suggested that mountains were formed when the edge of a drifting continent collided with another, causing it to crumple and fold. For example, the Himalayas were formed when India came into contact with Asia.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work