1P9: Tuesday 9th November, 2010

Matter and Particles: Chemical Changes

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!

Check your notebooks!

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?

Chemical Reactions

• Chemical reactions happen in our lives every day!

• Here are some examples:Frying an egg

Lighting a match

More chemical reactions…

Petrol burning in a car engine

Your body digesting food

Can you think of any more chemical reactions?

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.

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?

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.

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?

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!