← Progression Step 4 · Ages 11–14
Science
Chemical Reactions & Forces in Action
Signs of reaction, acids/alkalis intro and forces/speed calculations.
Observe safely, record results and use simple formulae where needed.
Reactions
Temperature change, gas, colour change, precipitate – evidence of change.
Acids and alkalis
pH scale idea; indicators; everyday examples.
Forces and speed
Speed = distance ÷ time. Unbalanced forces change motion.
Speed if 100 m in 20 s?
5 m/s.
Practice
1. Speed formula?
2. Name one sign of a chemical reaction.