- Sediment settles in a place due to gravity - The sediment breaks down into small particles - Wind or water picks up the sediment - The sediment travels along the same route as the wind or water - The sediment is deposited at new locations by the wind or water - The sediment is picked up again by new wind or water - The sediment travels further What might be the last step of the process?
Ans: The sediment is deposited again in a new place.

- 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?
Ans: The nest is done.

- A person breathes in oxygen - The oxygen passes through the bronchial tubes to the lungs - The oxygen is moved into the bloodstream - Circulates through the body - The cells in the body exchange the oxygen with carbon dioxide - The bloodstream carries the carbon dioxide back to the lungs What might be the last step of the process?
Ans: The lungs expel the carbon dioxide through the nose and mouth.

- A male and female bird mate - The female lays eggs - The eggs are incubated by the parents, by sitting on them, for weeks - The bird hatches from an egg - The parents feed them as the continue to grow - Develop flight feathers - The parents teach them to fly - After learning to fly they leave the nest to live on their own What might be the last step of the process?
Ans: The next year they breed beginning the cycle again