Question

monday science homework
skill: p.5.5a.4 - make and test predictions about how the density of an object affects whether it sinks or floats when placed in a liquid.
q1. a rock is dropped into water and sinks. what does this tell us about its density?
a. it has no density
b. it is less dense than water
c. it is denser than water
d. it has the same density as water

Explanation:

To determine the correct answer, we use the principle of density and buoyancy: an object sinks in a liquid if its density is greater than the liquid's density, and floats if its density is less (or equal, for neutral buoyancy). Since the rock sinks in water, its density must be greater than water's density. Option A is incorrect (all matter has density), B is incorrect (less dense would float), D is incorrect (same density would be neutrally buoyant, not sinking).

Answer:

C. It is denser than water