A patient visits their doctor because they are having trouble digesting complex carbohydrates. The doctor learns that her patient runs 5-10 miles 5 days a week and drinks very little water. The doctor suggested (before doing any major testing) that the patient begin drinking plenty of water each day. The patient visits the doctor a week later and has no problems with digestion. Why did the doctor suggest such a simple change in habit for her patient?

The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community

Which of the following is a way that minerals are used? a. industry construction technology d. all of the above

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules