Oral rehydration salts are used to A. purify air that has been polluted
B. replenish moisture in the environment after natural disasters such as earthquakes
C. purify water supplies to help minimize the risk of catching cholera
D. help replenish fluids in the body after it suffers fluid loss from diseases such as cholera

15 points need quick 1. looking at your graph and the geologic time scale during what period did this rock form? what is the age span of the rock, in millions of years? 2. this rock sample is limestone and shale. with what you know about rock formation, what type of environment did these organisms live in? 3. if some of these fossil samples were found in a rock also containing leaf fossils, could you use radiocarbon dating to determine the age of this rock? explain.