This document provides an overview of a chemistry lesson on chemical changes and reactions. It includes instructions for homework, a review of elements and compounds, examples of chemical reactions like burning fuel and digestion, and a demonstration experiment of burning magnesium. Students are asked to observe the experiment, note the appearance of magnesium before and after burning, and write the word equation for the reaction with magnesium and oxygen forming magnesium oxide.

1. 1P9: Tuesday 9th
November,
2010
Matter and Particles: Chemical
Changes

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. Check your notebooks!
Oxygen atoms
Element
Hydrogen atoms
Element
Water Molecules
Compound
Iron atoms
Element
Sulphur atoms
Element
Iron sulphide molecules
Compound

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. Chemical Reactions
• Chemical reactions happen in our lives every
day!
• Here are some examples:
Frying an egg
Lighting a match

6. More chemical reactions…
Petrol burning in a
car engine
Your body
digesting food
Can you think of any more chemical reactions?

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. 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. 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. 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. 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!