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

Problem: Given the question: - Chemical compounds rise into the air - Chemical compounds mix with elements in clouds - The affected rain falls to the earth - The affected rain can harm natural and man-made objects because of its acidic content. What might be the first step of the process?
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The answer is:
Human industry produces chemical compounds

Problem: Given the question: - The aluminum is collected - Taken to a treatment plant - The aluminum is sorted and cleaned ready for reprocessing - The aluminum is re-melted - Turned into molten aluminum - The aluminum is made into large blocks called ingots - The ingots are sent to mills to be rolled out - The rolled out product is made into new aluminum products. What might be the first step of the process?
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The answer is:
The consumer throws aluminum cans and foil into a recycle bin