Question

question 15 (5 points)
conductivity
true
false

question 16 (5 points)
the chemical composition does not stay the same in a physical change.
true
false

question 17 (5 points)
when water boils and turns into stem, which type of change occurs?
a chemical
b physical
c nuclear
d no change

Explanation:

• Conductivity is a physical property, so the question about it being true/false is incomplete. But for Question 16: In a physical change, the chemical composition remains the same. For Question 17: When water boils, it changes from liquid to gas (steam), which is a physical change as the chemical formula \(H_2O\) remains the same.

Answer:

Question 16: B. False
Question 17: B. physical