[Q]: What is the missing first step of the following process:  -  The water freezes and thaws - Cracks form in the rocks - Cracks also form when rocks heat up - The rocks slowly break down.
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[A]: Water seeps into rocks


[Q]: What is the missing first step of the following process:  -  Your diaphragm moves down - Your lungs have more room - Your lungs fill with air - You exhale - Your diaphragm moves back up - Carbon dioxide is exhaled - You start the process over again.
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[A]: You inhale


[Q]: What is the missing first step of the following process:  -  The sediment rolls down hill towards a river - The heavy items sink to the bottom - The lighter items float on the top and in convection cycles - As the river flows the sediment is moved - The sediment gets dumped through tributaries into lakes and the ocean - The sediment keeps moving around the world in convection currents.
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[A]: Sediment becomes loose from the rest of the soil


[Q]: What is the missing first step of the following process:  -  Sunlight is gathered by the leaves of the plant - The sunlight is broken down into glucose through photosynthesis - The glucose travels the plant - The plant uses that glucose as energy to grow.
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[A]:
Green is a color that gathers sunlight easily