1 p9 chemical changes 091010

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Matter and Particles: Chemical changes: S1

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1 p9 chemical changes 091010

  1. 1. 1P9: Tuesday 9th November, 2010 Matter and Particles: Chemical Changes
  2. 2. Homework • Homework set on Thursday 4th was due in yesterday, Monday 8th November… – Please hand this in by the end of this lesson, or first thing tomorrow morning otherwise you will receive a de-merit!
  3. 3. Check your notebooks! Oxygen atoms Element Hydrogen atoms Element Water Molecules Compound Iron atoms Element Sulphur atoms Element Iron sulphide molecules Compound
  4. 4. Let’s review our learning: show me boards • How did we separate the Iron and Sulphur mixture? • What do we call a material when two elements join together? • What do we call the process when two elements chemically join together? • Could we separate the compound using a magnet? • Are metals on the left or right of the Periodic Table? • Are non-metals on the left or right of the Periodic Table? • What are the only 2 liquid elements at room temperature? • Are the gases on the far left or far right of the Periodic Table? • What is at the centre of an atom? • What orbits the atom?
  5. 5. Chemical Reactions • Chemical reactions happen in our lives every day! • Here are some examples: Frying an egg Lighting a match
  6. 6. More chemical reactions… Petrol burning in a car engine Your body digesting food Can you think of any more chemical reactions?
  7. 7. Chemical Changes • Please copy this into your notebooks: There are many, many different types of chemical reactions. They all have some things in common. We are going to investigate some chemical reactions.
  8. 8. Time for an experiment! • Burning Magnesium – REMEMBER, do NOT look directly into the white flame! – Draw a labelled diagram of the experiment – Note all of your observations – What did Magnesium look like before it was burned? – What did it look like after?
  9. 9. Word Equations Add this into your notebook after your report on the experiment: Magnesium + Oxygen  Magnesium Oxide When anything burns it takes in Oxygen from the air.
  10. 10. Let’s review our results: show me boards • What is the chemical symbol for Magnesium? • What happened in the experiment? • What did Magnesium look like before it was burned? • What did it look like after it was burned? • What new product was made? • Was the new product a compound or a mixture? • Can we separate the compound back to the elements? • Where did the Oxygen come from to burn with the Magnesium? • What is the chemical symbol for Oxygen?
  11. 11. What’s next? • You will be performing more experiments on chemical changes on Thursday…  • Using your traffic light colours – please let me know if you have understood chemical reactions today!

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