Lesson 3
Chemical & physical changes
You need to be able to identify physical and chemical changes.
Objectives:
Know the difference between a physical and a chemical change.
Be able to draw the arrangement of particles in solids, liquids and gases.
Know the names of the changes of state.
PART A
Copy this paragraph:
Chemical reactions are changes where a new substance has formed; they are permanent changes because it cannot change back. If no new substance has been formed but there has still been a change (e.g. shape, state) then we have a physical change; these changes are reversible.
Chemical reactions are changes where a new substance has formed; they are permanent changes because it cannot change back. If no new substance has been formed but there has still been a change (e.g. shape, state) then we have a physical change; these changes are reversible.
PART B
Watch this video lesson.
7 8 physical chemical changesPART C
Draw and label the following diagram.
changing state.pngPART D
Watch this video of a chemical change.
Well done if you got 5/5 on the quiz, if you didn't go back through the lesson again.
Well done if you got 5/5 on the quiz, if you didn't go back through the lesson again.
End of lesson
End of lesson