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

- The fault lines grow over time - The rocks on each side of the fault lines rub against the rocks on the other side of the fault line - The rocks put pressure on each other - The rocks break from the pressure - The breaking of the rocks releases a lot of energy - The energy causes seismic waves - The seismic waves make the earth shake. What might be the first step of the process?
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Answer: Fault lines appear underground

- People burn coal for heat or electricity - Pollution from the coal goes into the sky - Coal pollution enters clouds - Clouds rain over an area - The polluted rain becomes acid rain. What might be the first step of the process?
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Answer:
People dig up coal from the ground