[Q]: -  The pancreas creates juices that help digest food - The pancreas releases the juices into the stomach - Trypsin and chymotrypsin digest protein - Insulin is produced to move glucose from the blood - The enzymes begin producing again.  What might be the first step of the process?
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[A]: The pancreas detects chemical changes in the stomach


[Q]: -  Makes water acidic - Kills fish - Kills the soils in trees - Leaves are also harmed.  What might be the first step of the process?
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[A]: Acid rain enters the atmosphere and lands


[Q]: -  The cold water forms ice crystals - The ice crystals grow by absorbing surrounding water droplets - Form snowflakes - The snowflakes fall to the ground.  What might be the first step of the process?
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[A]: Water in the clouds becomes very cold


[Q]: -  The earth changes energy from the sun into heat - Heat rises from the ground - Greenhouse gas molecules in the atmosphere prevent the heat from going into space - The temperature of the earth increases - The temperature continues to rise and melts the polar ice caps - The temperature rises even faster.  What might be the first step of the process?
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[A]: