Lesson Starter. Q: Four groups measured the height of their table. Their results were: 92cm, 103cm, 110cm, and 95cm. Calculate the average height of the tables.

Calculations in science. Aims: Carry out chemical reactions and observe changes in appearance.

You should be able to do these by the end of the lesson! Success Criteria WHAT CAN I DO? Red Amber Green Work safely in the Science Lab obeying safety rules. Measuring with precision appropriate to the technique. Observe carefully what happens in experiments. Identify a chemical reaction by a change in appearance in a substance. You should be able to do these by the end of the lesson!

Chemical Reactions A chemical reaction occurs when a new substance is formed. It cannot be reversed. Evidence of a chemical reactions is: Gas Precipitate (solid forming) Colour change Energy change (eg. Heat or light being given off)

Physical Change A physical change alters the form of a substance, but does not change it to another substance. Water boiling Making orange juice

Mixing Chemicals Station 1 – Mix 5ml of Lead Nitrate with 5ml of Potassium iodide in a test tube. Write down what you observe. Station 2 – Mix one spatula of marble chips with 5ml of hydrochloric acid in a test tube. Write down what you see. Station 3 – Mix 3ml of olive oil with 5ml of water. Write down what you see. Station 4 – Mix one spatula of copper filings with 5ml of water. Write down what you see.

You should be able to do these by the end of the lesson! Success Criteria WHAT CAN I DO? Red Amber Green Work safely in the Science Lab obeying safety rules. Measuring with precision appropriate to the technique. Observe carefully what happens in experiments. Identify a chemical reaction by a change in appearance in a substance. You should be able to do these by the end of the lesson!

Chemical Reaction or Physical Change? Cutting Paper Physical Change

Chemical Reaction or Physical Change? Chemical or Physical Change? Ice Melting Physical Change

Chemical Reaction or Physical Change? Chemical or Physical Change? Toast Burning Chemical Change

Chemical Reaction or Physical Change? Chemical or Physical Change? Rocket Fuel Burning Chemical Change

Chemical Reaction or Physical Change? Chemical or Physical Change? Sawing Wood Physical Change

Chemical Reaction or Physical Change? Chemical or Physical Change? Baking cakes Chemical Change

Chemical Reaction or Physical Change? Chemical or Physical Change? Frying an egg Chemical Change