Aiming for Grade 4 LOs:

• Describe a simple cell.
• Describe a battery.
• Give an example of a non-rechargeable battery.

Aiming for Grade 6 LOs:

• Explain how potential difference can be changed in a cell.
• Interpret data from an electrochemical cell to determine the reactivity of the metals involved.
• Explain why non-rechargeable batteries stop working.

Aiming for Grade 8 LOs:

• Describe an electrochemical cell with half equations and ionic equations.
• Explain why the reactions in an electrochemical cell are redox reactions and determine which species is oxidised or reduced in an electrochemical cell.
• Evaluate the use of non-rechargeable cells.