Due in an hour, having trouble figuring out this last part of my assignment

What statement is true about all chemical changes? a) chemical changes can be undone. b) chemical changes cannot be reversed. c) chemical changes change the color of objects. eliminate d) chemical changes do not form new products.

When the blood leaves the atria (upper chambers) where does it flow to? a. aorta b. lungs c. ventricles d. rest of the body

Marcy is a very good math student, but she seldom studies for tests. as a result, her grade has dropped this semester. this is an example wasting talent getting distracted allowing others to set goals