Which term describes a statement that describes invariable relationships among phenomena under a specified set of conditions?

Which term describes a statement that describes invariable relationships among phenomena under a specified set of conditions?

• A. Law
• B. Theory
• C. Constant
• D. Isotonic

Answer: (A)

A scientific law describes consistent, invariable relationships between phenomena under a defined set of conditions. It tells you what happens reliably when those conditions are met, often in a concise or mathematical form. The focus is on the pattern itself rather than why it happens. For example, a gas law captures how pressure and volume relate when temperature is kept constant. A theory, on the other hand, explains why a phenomenon occurs and ties together many observations; it can be revised with new evidence. A constant is just a fixed value, not a statement about relationships between variables. Isotonic is unrelated here, as it refers to having equal solute concentration, not to describing a universal relationship under specified conditions.

A scientific law describes consistent, invariable relationships between phenomena under a defined set of conditions. It tells you what happens reliably when those conditions are met, often in a concise or mathematical form. The focus is on the pattern itself rather than why it happens. For example, a gas law captures how pressure and volume relate when temperature is kept constant. A theory, on the other hand, explains why a phenomenon occurs and ties together many observations; it can be revised with new evidence. A constant is just a fixed value, not a statement about relationships between variables. Isotonic is unrelated here, as it refers to having equal solute concentration, not to describing a universal relationship under specified conditions.