Problem: - An organism dies - Water seeps into the remains - Minerals dissolved in the water form crystals - Crystalized minerals cause the remains to harden What might be the last step of the process?

A: The minerals form a fossil.

Problem: - Forest fires burn forests - The animals living in the forest have fewer places to hide - Predators can now find their prey eaiser - Birds will fly away from the area What might be the last step of the process?

A: Waters warm up which hurts the fish swimming in them.

Problem: - Water comes through a filter - The filter has small pores to catch pollutants - The filter will catch chlorine, heavy metals, and other chemicals - The filter allows water and mineral ions like fluoride to pass through What might be the last step of the process?

A: The water on the other side of the filter is much cleaner

Problem: - A bird lays an egg - The egg hatches into a baby bird - Baby bird eats - Grows into an adult bird - The bird finds a mate - The pair build a nest What might be the last step of the process?

A:
The birds lay eggs.