Question

1. physical properties can be ____. a. observed and measured b. observed and not measured c. measured but not observed 5. matter is defined by ____. a. it’s physical properties b. how it physically changes c. both d. neither

Explanation:

Question 4

Physical properties are characteristics of a substance that can be observed (like color, state) and measured (like mass, volume). Option B is wrong as many physical properties can be measured. Option C is wrong because to measure, we first observe or can observe the property. So A is correct.

Matter is defined by its physical properties (like mass, volume, density) and how it physically changes (like phase changes, dissolving without chemical change). So both aspects help define matter. Option A and B alone are incomplete, D is wrong. So C is correct.

Answer:

A. Observed and Measured

Question 5