Physical properties are described as those that can usually be detected by

• A. Laboratory instruments
• B. Microscopy
• C. Human senses
• D. Chemical tests

Answer: (C)

Physical properties are attributes you can notice without changing what the substance is. In everyday terms, many of these properties show up through human senses: color, odor, appearance, and texture can be detected by sight, smell, or touch. That’s why describing physical properties as something you can usually detect with your senses fits well—the senses give a quick, initial read on these properties. Instruments, microscopy, or chemical tests are used when properties aren’t readily perceived by senses or when you need precise measurements or chemical information, which goes beyond the basic physical description.