What rigorous in high school might expect

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.

Which of the following departments would be included in a state government's public safety function? department of education department of emergency management department of environmental protection department of banking and consumer finance

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