scientific investigation starts with an observation of a natural phenomenon or problem, what observation prompted the family to conduct a scientific investigation? (please need help)

An alcohol thermometer makes use of alcohol's changing in order to measure temperature. as the temperature goes up, the alcohol contained in the thermometer increases in volume, filling more of the thermometer's tube.

Determine the reaction and balance the following equations urgent due in the morning

Jose and eric were given four samples in lab. the results of their analysis are shown in the table. based on the data they collected, which sample is most likely a metal?