Chemistry Paper 2
Gas tests
Chemical Analysis training before the targeted original question drill.
Adaptive teaching card
Make it concrete
Analogy
Gas tests is like changing a recipe: the particles, amounts and conditions decide what product you can make.
Why now: An analogy helps when the definition feels abstract.
Do this: Match each part of the analogy to the science idea.
Learn it
Hydrogen gives a squeaky pop with a lit splint.
Oxygen relights a glowing splint.
Carbon dioxide turns limewater cloudy.