Question

the drawing shows a students investigation.
student investigation
sample 1: a pan with water, and a black rectangle on the water surface
sample 2: a pan with water, and a black rectangle submerged in the water
which prediction do these results support?
a. sample 1 is more dense than sample 2, so it is more likely to float in water.
b. sample 1 is less dense than sample 2, so it is more likely to float in water.
c. sample 2 is larger than sample 1, so it is less likely to float in water.
d. sample 2 is smaller than sample 1, so it is less likely to float in water.

Explanation:

Step1: Analyze floating condition

An object floats in water if its density is less than water's density, and sinks if its density is greater. From the diagram, Sample 1 floats (on water surface), Sample 2 sinks (under water). So Sample 1's density < Sample 2's density.

Step2: Evaluate each option

• Option A: Claims Sample 1 is more dense, but it floats (should be less dense). Wrong.
• Option B: Sample 1 is less dense than Sample 2, and since it floats, less dense objects are more likely to float. Correct.
• Option C: Size doesn't determine floating (density does). Sample 2's size vs Sample 1 isn't clear, and size isn't the factor. Wrong.
• Option D: Size doesn't determine floating (density does). Wrong.

Answer:

B. Sample 1 is less dense than Sample 2, so it is more likely to float in water.