Instruments to measure wood block density?

A thermometer measures temperature, which is not relevant for determining density. While a cylinder could potentially be used to measure volume (if it were a graduated cylinder for liquids), it does not provide the necessary mass measurement needed to calculate density. Therefore, this combination does not effectively measure wood block density.

A scale can measure weight, but without knowing the volume of the wood block, you cannot calculate density. A barometer measures atmospheric pressure, which is unrelated to density measurements of solids like wood. Thus, this choice lacks the necessary instruments to determine wood block density.

An odometer measures distance traveled by a vehicle, which is irrelevant to density measurement. While a meterstick can measure the dimensions of the wood block, without a means to measure mass, density cannot be calculated. This option also fails to provide the required instruments for density determination.