Q: -  Blood enters the kidney - The blood travels into the neophrons - Waste is expelled via the neophrons - The waste goes to the bladder in the form of urine  What might be the last step of the process?
A: The clean blood exits the kidneys.

Q: -  Food leaves the esophagus and enters the stomach - The stomach churns the food - With the aid of stomach acids - The food becomes a thick liquid  What might be the last step of the process?
A: Is then passed to the small intestine.

Q: -  One type of air pollution is the addition of carbon dioxide gas into the air - Some scientists believe that releasing too much carbon dioxide into the atmosphere is one of the causes of global warming - This upsets the balance of the carbon cycle - The ozone layer helps protect us from harmful rays from the sun - It is getting damaged from air pollution such as methane gas from livestock and CFCs from spray cans - Acid rain is created when gasses such as sulfur dioxide get high into the atmosphere - The wind can blow these gasses for miles and then they get washed out of the air when it rains  What might be the last step of the process?
A: This rain is called acid rain and can damage forests and kill fish.

Q: -  A hurricane usually starts as an organized thunderstorm activity that stretches at least 100 miles across and maintains its identity for more than 24 hours - Under the right conditions it can develop further and start to spin around a low-pressure center - If it develops it&#x27;s classified as a &#x27;tropical cyclone&#x27; or &#x27;tropical depression&#x27; - If the system strengthens and wind speeds rise past 39 mph, the system is dubbed a &#x27;tropical storm&#x27;  What might be the last step of the process?
A: