Stretch and challenge

Boiling point: a surprising measurement | Stretch and challenge | 11–14 years
Develop critical thinking skills by guiding learners to evaluate possible explanations for an unexpected experimental result
Atomic structure and the Sun | Stretch and challenge | 14–16
Stretch learners’ understanding of atomic structure using the context of the Sun
Bonding models | Stretch and challenge | 14–16 years
Challenge learners to explore alternative models, using plasticine and cocktail sticks
Ionic bonding and electron transfer | Stretch and challenge | 14–16 years
Learners evaluate and discuss ideas about ionic bonding, the formation of ions and energetics
Swimming pool chemistry | 16–18 years
Synoptic questions explore structure and bonding, equilibrium and spectrometry and spectroscopy in the context of swimming pools
Candle burning investigation: planning an experiment
Concept cartoon and example investigation to practise developing a hypothesis, planning an investigation and evaluation skills
Rusting: a lateral thinking problem | 11–14 years
Learners apply their knowledge of rusting in the context of shipwrecks. A lateral thinking exercise and planning an investigation will help them develop higher-order skills.

Boiling point: a surprising measurement | Stretch and challenge | 11–14 years