Final answer:
Sara can test the temperature range at which the butter heart sculpture would remain a solid by conducting an experiment using different temperatures. By observing and recording the temperature at which the butter melts, she can determine the temperature range at which the sculpture remains a solid.
Step-by-step explanation:
To test the temperature range at which the butter heart sculpture would remain a solid, Sara could design an experiment using different temperatures. She could start by placing small amounts of butter in separate containers and subjecting each container to different temperatures within a specific range. For example, she could place one container in a freezer at -10°C, another at room temperature, and a third container in an oven at 50°C. Sara would then observe and record at what temperatures the butter melts in each container. By testing different temperatures, Sara can determine the temperature range at which the butter heart sculpture would remain a solid.