Problem: - Living organisms in the sea die - The matter forms on the sea floor - Layers of sediment form above the matter compressing it - After many years the matter is compressed and heated What might be the last step of the process?

A: The result is that crude oil forms.

Problem: - Rain falls on wood - The rain seeps into the wood surface - It permeates the wood - When rain evaporates it leaves the wood - It takes the finish of the wood with it - The wood begins to lose it's luster - It begins to look bad - It has pieces of paint missing from the rain - It gets worse when it rains What might be the last step of the process?

A: It eventually will have no paint left.

Problem: - A type of coal must be chosen before the heating can start - The coal is broken down to a smaller material - The coal particles mix with hot air and move in to a boiler - Water in the boiler is pumped and produces steam with the coal - Steam powers turbine blades, which magnetically charge wire coals What might be the last step of the process?

A: The water returns back in to its chamber and the process is repeated

Problem: - The bird picks a tree - The bird collects twigs and other refuse - The bird makes a flat base with twigs - The bird makes sides with twigs and other things - The bird adds softer material to the inside What might be the last step of the process?

A:
The nest is done.