Which is true of oxidation?
a) It is a physical process
b) No change occurs in the makeup of rock
c) Rocks weather at different rates
d) Water freezes in cracks in rock

*will mark brainliest* which of the following best describes a viral infection, such as the common cold? a. virus grow and develop in the body. b. virus are living organisms. c. viruses require host cells in the body. d. viruses can be treated with antibiotics.

Where do the respiratory and circulatory systems meet? a. in the heart b. in the muscles c. in the lungs d. in the brain

Which law represents a balanced chemical equation?