Problem: - Water droplets are in clouds - The air gets cold - Water droplets turn into ice crystals - Ice crystals in clouds stick together and become snowflakes. What might be the first step of the process?

A: Water evaporates from the ground up to the sky

Problem: - The shaft of the turbine spins - Shaft is connected to a generator - The generator uses the spins of the shaft to rotate a rotor - The rotor spins inside the core, which has magnets inside surrounded by wire loops inside - The spinning of the rotor in the core generates electricity - What might be the first step of the process?

A: Wind passes the turbines and moves the blades

Problem: - They process it with millions of tiny nephrons - Remove all the waste - The kidneys return the blood back to the body through the renal artery - Send the urine with the waste to the bladder through the ureters. What might be the first step of the process?

A: The kidneys receive blood from the renal artery

Problem: - These substances rise into the high atmosphere - They react with water and oxygen - This creates a more acidic rain - The rain with the high acid content falls. What might be the first step of the process?

A:
Chemicals like sulfur dioxide and nitrogen are released into the air