[Q]: What is the final step of the following process: -  When water freezes it becomes 10% bigger, or takes up 10% more space - As water expands it puts great pressure on the walls of anything containing it, including any rocks which happen to be surrounding it - The force of the pressure exerted on the rock surrounding it is enough to wedge the walls of the crack farther apart, thus expanding and deepening the crack - Clay expends when wet like ice does - This causes rock to break apart - Some plants like mosses and lichens are capable of growing without soil on bare rock
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[A]: When they do this their roots penetrate pores and crevices and cause rocks to split apart as the roots force their way down through the rocks


[Q]: What is the final step of the following process: -  Mix flour, baking powder, sugar, and salt into a bowl - Mix in milk, eggs, and melted butter - Mix until smooth - Heat a griddle or frying pan to medium high
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[A]: Pour batter onto the griddle


[Q]: What is the final step of the following process: -  Oil is gathered through mining operations - The oil is transported to stores - Oil is purchased by homeowners - Oil is placed into a stove in the house - The oil is lit on fire, and burns for a long time
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[A]: The warm air off of the oil travels through the house


[Q]: What is the final step of the following process: -  Iron is exposed to oxygen - Is exposed to air - A chemical reaction occurs - The iron starts to oxidize
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[A]: