Question

When milk turns sour it is a_________

A) Chemical change
B) Physical property
C) Physical change
D) Chemical property

How many main states of matter are there?
A) 3
B) 2
C) 1
D) 4

Which is not considered a chemical substance? A) Solid
B) Plasma
C) Gas
D) None of the above

Chemical substance may change between phases of matter with changes in?
A) Light
B) Sound
C) Temperature
D) Smell​

Answer 1

A, A or D (view explanation), D, C

Step-by-step explanation:

Question 1:

The answer is A) Chemical Change. This can be identified by the newly-formed taste, smell, and composition of milk. The chemical change it undergoes is called fermentation.

Question 2:

A or D.

Depending on what you have learned in your lesson it may be your classic three (solid, liquid, and gas), but it may also have the addition of "plasma". I cannot give you a certain answer since I do not know what you're learning.

Question 3:

None of the above. A chemical substance has a definite chemical composition. Everything listed falls under this category.

Question 4:

Temperature. Think to evaporation, condensation, and the like.