7F+Bubbles+&+Bangs

= 7F Bubbles & bangs =

Lesson 1 Physical & Chemical Change
A **chemical change** always makes a **new substance**: a) If a __gas__ is given off you may see __bubbling__, or __smell the gas__ b) The new substance might be a __different colour__ c) The new substance may appear as a __cloudy solid__ from __clear solutions__
 * 1) 1. Sometimes the new substance is easily seen. For example:
 * 1) 2. Sometimes the new substance is difficult to see. Often, during a chemical change __heat__ is given out or taken in, so that you can measure a __temperature change__

A **physical change** does **not make a new substance**. You can often get the original substance back by simple means, like evaporation, filtering or chromatography



__Homework:__ To be completed in your exercise books (Don't forget to put a sensible title and date)



http://dcsks3science.wikispaces.com/7F+Bubbles%2C+bangs+and+burning

http://789science.wikispaces.com/Bubbles%2C+bangs+and+burning

Atoms, elements & compounds
Look at the Periodic table given - make sure that you understand the difference between the meaning of the words atom, element and compound.

2Mg + O2 -> 2MgO
The conservation of mass....

Lesson 4
AT1 - Candle burning

A practical which is designed with guidance from the teacher and carried out independently.
Remember to include the Independent, Dependent & Controlled Variables.

A research Activity into putting out fires.
Remember the fire triangle!

Lesson 6
Testing for Oxygen, Hydrogen & Carbon Dioxide Learn these tests thoroughly!