What is a physical change? (1 point)
Responses
a change that does change the chemical identity of a substance
a change that does change the chemical identity of a substance
a change that is not visible
a change that is not visible
a change that is visible
a change that is visible
a change that does not change the chemical identity of a substance
a change that does not change the chemical identity of a substance
A piece of paper is torn into pieces.
Why is this an example of a physical change?
(1 point)
Responses
the paper molecules become smaller
the paper molecules become smaller
the paper molecules change their state of matter
the paper molecules change their state of matter
the paper molecules remain paper molecules
the paper molecules remain paper molecules
the paper molecules break up
the paper molecules break up
Which statement best describes the molecules of a solute that has fully dissolved into a solvent? (1 point)
Responses
They are all settled at the bottom of the solution.
They are all settled at the bottom of the solution.
They have changed color, causing the solution to change color.
They have changed color, causing the solution to change color.
They are evenly spread out throughout the solution.
They are evenly spread out throughout the solution.
They have gotten hotter, causing the solution to evaporate.
They have gotten hotter, causing the solution to evaporate.
They are evenly spread out throughout the solution.
Dissolving Quick Check
4 of 44 of 4 Items
Question
Maria is bored over the weekend and decides to mix salt and sugar together. Is she causing a physical or chemical change? (1 point)
Responses
This is a physical change because the salt and sugar dissolve in water.
This is a physical change because the salt and sugar dissolve in water.
This is a chemical change because the salt and sugar grains change state.
This is a chemical change because the salt and sugar grains change state.
This is a chemical change because the salt and sugar molecules change.
This is a chemical change because the salt and sugar molecules change.
This is a physical change because the salt and sugar grains do not change.
This is a physical change because the salt and sugar grains do not change.
This is a physical change because the salt and sugar dissolve in water.
question 2 and 4 were wrong bot D:
I apologize for the incorrect responses. Let me correct them for you.
Question 2: The statement "They are evenly spread out throughout the solution." is correct. This describes the molecules of a solute that has fully dissolved into a solvent.
Question 4: The correct response is: "This is a physical change because the salt and sugar grains do not change." In the process of mixing salt and sugar together, the grains of salt and sugar do not undergo any chemical changes. They still remain as salt and sugar. Thus, it is a physical change rather than a chemical change.