- Nephrons in the kidney filter the blood - The waste that is filtered out mixes with water - Become urine - Ureters carry urine out of the kidneys. What might be the first step of the process?
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Answer: Blood carried into kidney by the renal artery

- Oxygen moves from the lungs into the bloodstream - Air is pushed through the vocal chords - A person talks - Other air is pushed out of the lungs into the environment. What might be the first step of the process?
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Answer: Air is pulled into the lungs

- There is a lot of pressure on the Sun - The pressure forces atoms of hydrogen to fuse together in nuclear reactions - The energy from the reactions gives off different kinds of light - The light travels to the Earth. What might be the first step of the process?
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Answer:
The gravity of the sun pulls its mass inward