Question

Which is an example of a physical change?

es )
A)
Mixing blue and yellow paint to create green paint
B)
Adding water and yeast to bread dough in order to make it raise.
C)
Mixing two liquids together in a test tube and the tube becoming warm.
D)
Adding a piece of chalk containing calcium carbonate to a glass of mild
acid causing the formation of a foam of bubbles.

Answer 1

A

Step-by-step explanation:

Answer 2

A.

Step-by-step explanation:

You can see blue and yellow create green. You can't see dough rise, you can't see something become warm, so on so forth.