Question

q3. a scientist compares oil and water. oil floats on top of water. which statement is true? a. oil is denser than water b. oil has no density c. oil is less dense than water d. oil and water have the same density

Explanation:

To determine the correct statement, we use the principle of density and buoyancy: an object (or liquid, in this case) floats on another liquid if it is less dense. Since oil floats on water, oil must be less dense than water.

• Option A is incorrect because a denser substance would sink, not float.
• Option B is incorrect as all matter has density.
• Option D is incorrect because equal - density substances would mix or not have a distinct floating/sinking relationship in this way.

Answer:

C. Oil is less dense than water