Problem: What is the missing first step of the following process: - The blood is passed through the nephrons in the kidneys - The kidneys filter the waste from the blood - The clean blood is circulated out of the kidneys - Excess water and waste is expelled from the kidneys in the form of urine.

A: The kidneys receive blood through the renal artery

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

input 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.???
output answer: Water gets into cracks in rocks

What is the missing first step of the following process: - They sit still on a perch, like a stump of branch, and wait for prey - They use their highly sensitive hearing to locate prey that cannot be seen - They use their very keen vision to see prey in the dark - They fly silently, without flapping their wings, in order to surprise the prey - The owl silently glides or drops on its prey, grabbing it with its talons and beak - The owl eats the prey, or carries it back to its perch -
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Answer: Owls hunt around their hunting territory away from where they roost during the day

Q: What is the missing first step of the following process: - Water is poured into the well of the machine - A filter is placed in the basket - Ground coffee is measured into the filter - Turning on the machine starts the water heating - The hot water rises up - The water drops into the ground coffee - The hot water passes through the grounds - The coffee drips into the pot from the basket.
A: The coffee pot is filled with water

[Q]: What is the missing first step of the following process: - The isotope is unstable - The isotope emits radiation - The isotope decays - The isotope loses some atomic particles - The isotope turns into a different element - The isotope is finished decaying and emitting radiation.
****
[A]:
An isotope has too many protons