Question

1. which physical property is shown by scratching one material with another?

malleability
viscosity
conductivity
hardness

Explanation:

• Malleability refers to the ability of a material to be hammered or rolled into thin sheets.
• Viscosity is a measure of a fluid's resistance to flow.
• Conductivity is the ability of a material to conduct heat or electricity.
• Hardness is a measure of a material's resistance to scratching. Scratching one material with another is a common way to test the hardness of a material.

Answer:

hardness