Question

elliot wants to compare the density of four objects to the density of water. elliot knows that if an object sinks in water, it has a higher density than water and that if an object floats in water, it has a lower density than water. which of the following is a scientific investigation that elliot could conduct to test the densities of the objects?
a. elliot could put the four objects in water to see if they sink or float.
b. elliot could ask his teacher which object has the greatest density.
c. elliot could put the objects in water to see how much water they absorb.
d. elliot could look up the densities of the objects in a textbook.

Explanation:

To test the densities of objects, a common and simple scientific method is to observe whether they sink or float in water as density determines buoyancy. Putting objects in water to check their sinking - floating status can give an indication of their density relative to water. Looking up densities in a textbook is more for getting exact values rather than conducting an investigation. Asking a teacher doesn't test the densities. Absorbing water is not related to density - testing in the context of comparing with water's density.

Answer:

A. Elliot could put the four objects in water to see if they sink or float.