- Enters the lungs - The oxygen fills the sacs in your lungs - Carbon dioxide is removed from the lungs and exhaled - The oxygen is pass throughout your body. What might be the first step of the process?
Ans: Air is taken through the mouth

- 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 - The birds lay eggs. What might be the first step of the process?
Ans: A bird lays an egg

- 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 - The warm air off of the oil travels through the house - What might be the first step of the process?
Ans: Oil is gathered through mining operations

- The water freezes and thaws - Cracks form in the rocks - Cracks also form when rocks heat up - The rocks slowly break down. What might be the first step of the process?
Ans: Water seeps into rocks