The effect of adding salt to ice: do and review (non-statutory)

Rock salt is often used to melt the ice on roads and pavements. Adding salt to ice (frozen water) lowers the melting temperature and speeds up the rate of melting. Scientists use a range of equipment to observe, measure and compare when they investigate to find answers to questions. The results of an investigation are used to make conclusions. When scientists review an investigation, they look again at what they have done and consider if it could be improved.