Question

1. which of the following is a physical property of a substance? flammability reactivity oxidation density 20. what type of energy transfer involves the movement of thermal energy through fluids? insulation convection radiation conduction

Explanation:

1. Physical properties can be observed or measured without changing the substance's chemical composition. Flammability, reactivity, and oxidation involve chemical changes. Density is a physical property as it is mass per unit volume and does not change the substance chemically.
2. Convection is the transfer of thermal energy through fluids (liquids and gases) due to the movement of the fluid itself. Insulation resists heat transfer, radiation is the transfer of energy through electromagnetic waves, and conduction is the transfer through direct contact.

Answer:

1. Density
2. Convection