If the density of the object decreases, which must be true?

Science
Tutor: None Selected Time limit: 1 Day

I'm at school at break time, only have 25 more minutes until 2nd period of this science test.

If the density of the object decreases, which of the following must be true?

A. The volume may have increased. (I think it's A, but I'm not sure)

B. The mass may have increased.

C. The object will float (My friends say it's C, but I think it's wrong)

D. The object will sink

Oct 21st, 2015

Thank you for the opportunity to help you with your question!

Density= Mass/ volume

since volume is inversely proportional to density, its increase will decrease the density of the object provided mass is held constant. Therefore:

A. The volume may have increased. ( is the appropriate answer).

the object  will float is not right answer, just ask yourself this question, " if a stone slightly reduces in density, will it float? the answer is no!


Please let me know if you need any clarification. I'm always happy to answer your questions.
Oct 21st, 2015

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