[Q]: What is the missing first step of the following process: - Attach a rocket - Add rocket fuel - Launch rocket - Satellite goes into orbit.
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[A]: Build a satellite

[Q]: What is the missing first step of the following process: - The water combines with carbon dioxide in the air to form carbonic acid - As the acid is formed, the iron starts to dissolve - Some of the water breaks down into hydrogen and oxygen - The free oxygen and dissolved iron bond together - They form iron oxide, which is rust -
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[A]: Water comes into contact with something made of iron

[Q]: What is the missing first step of the following process: - The bird collects bits of sticks and grass - The sticks and grasses are placed between support branches - Leaves, mud and spider webs are added to the sticks - The mud, leaves and webs glue the sticks together - The solid nest supports the eggs -
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[A]: A bird picks a spot high spot, often in a tree

[Q]: What is the missing first step of the following process: - The light energy is used to convert carbon dioxide - The plant uses nutrients in the soil - The plant uses carbon dioxide in the air to produce glucose - The plant uses the glucose to give itself energy - Oxygen is released as a by product.
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[A]:
Light energy is absorbed by chlorophyll in a plant