Problem: Given the question: What is the missing first step of the following process: - The aluminum is collected - Taken to a treatment plant - The aluminum is sorted and cleaned ready for reprocessing - The aluminum is re-melted - Turned into molten aluminum - The aluminum is made into large blocks called ingots - The ingots are sent to mills to be rolled out - The rolled out product is made into new aluminum products.
++++++++++++++++++++++++++++++++
The answer is:
The consumer throws aluminum cans and foil into a recycle bin

Problem: Given the question: What is the missing first step of the following process: - The water freezes into ice - The cracks expand - Over time the rocks split - The rocks are now in smaller pieces.
++++++++++++++++++++++++++++++++
The answer is:
Water gets into cracks in rocks

Problem: Given the question: What is the missing first step of the following process: - Some is reflected back into space - The rest of the energy is absorbed by land and oceans, heating the Earth - Heat radiates from Earth to space - Some of this heat is trapped by greenhouse gases in the atmosphere - Human activities such as burning fuel are increasing the amount of greenhouses gases - This causes more heat radiation to stay trapped in our atmosphere - The Earth's temperature rises -
++++++++++++++++++++++++++++++++
The answer is:
Solar radiation reaches Earth's atmosphere