What is the missing first step of the following process: - The cells of the lung hold the air - They take in the air and remove the Oxygen - They inflate and all the bad air leaves through the mouth - They do it all over again.
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Answer: They expand to take the air in

What is the missing first step of the following process: - The trees and plants burn - The animals lose their homes - If the animals can not escape, they may die from smoke inhalation - The plants that provide food are gone - The animals have little to eat -
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Answer: A forest fire starts

What is the missing first step of the following process: - The roots of the growing plants start to break up the rock - The plant acids dissolve the rock - The rock is broken down into smaller pieces - Erosion begins.
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Answer:
Plants start growing on or near the rocks