Students are given two equations describing the burning of petrol. Students identify each as either complete or incomplete combustion and then describe two disadvantages of incomplete combustion.
Task: Decide whether described situations are examples of melting or dissolving, provide further examples, and describe what happens when something melts, and when something dissolves. Assessment focus: definitions of melting and dissolving.
Students use a diagram that shows a proposed site for a town that has a river running through it. Students identify where it would be best to collect drinking water, and how town planners could stop the town from flooding.
Students select from four pictures of laden trucks which is least likely to roll over when cornering, and explain their predictions. This resource assesses students' understanding of centre of gravity.