Question

level 1 q1 physical properties can be observed and measured without changing the substances a appearance b composition c property d all of the above level 1 q2 what is the ability of a substance to burn or ignite, causing fire or combustion? a chemical stability b reactivity c flammability d conductivity

Explanation:

Physical properties can be observed or measured without changing the substance's composition. Appearance is a physical property. Flammability is the ability of a substance to burn or ignite, causing fire or combustion.

Answer:

Q1: A. Appearance
Q2: C. Flammability