Final answer:
The tests Naheed and Eliza did in science class were trying to determine the properties of different metals.
Step-by-step explanation:
The tests Naheed and Eliza did in science class were trying to determine the properties of different metals. They might have performed experiments to investigate qualities such as conductivity, malleability, and reactivity of different metals. By observing and measuring these properties, they could analyze and compare the characteristics of each metal.