Acids and Bases Garden

What your child will figure out

• Predict the direction pH will move before adding acid or base, then check the prediction with universal-indicator evidence.
• Reach any value in a plant's healthy pH range by reasoning about both direction and drop amount.
• Explain why equal-volume strong and weak additions can produce different pH changes.
• Classify unfamiliar everyday samples as acidic, neutral, or basic using their pH and indicator colour, then practise adaptively across all four skills.

The levels

1. Which way?

   Predict and observe the direction of pH change from one acid drop and one base drop.

2. Help the basil

   Move acidic basil soil into any value in its pH 6–7 healthy range.

3. Same drop, big surprise

   Compare equal-volume weak and strong base drops and explain the different pH changes.

4. Mystery shelf

   Transfer the pH rule to lemon juice, hand soap, and water using indicator evidence.