Problem: What is the missing first step of the following process: - Remove any ice cubes currently in the tray - Fill the tray with cold water - Ensure the tray is evenly filled to an appropriate level - Open the freezer - Place the tray in the freezer - Close the freezer door - Wait.

A: Get the ice tray

Problem: What is the missing first step of the following process: - The cells of the lung hold the air - They take in the air and remove the Oxygen - They inflate and all the bad air leaves through the mouth - They do it all over again.

A: They expand to take the air in

Problem: What is the missing first step of the following process: - Steam is produced under pressure - Flows into a turbine - The turbine spins - Creates electricity.

A: Coal is burned in a boiler

Problem: What is the missing first step of the following process: - You fill the tray with warm water - You carefully place the tray on an even surface in a freezer that is at least 32 degree Farhenheit, the freezing point of water - The water begins to get colder until it starts to freeze solid - The water expands as it freezes, one of the few liquids that has greater volume as a solid - Because you used warm water, the gasses in the water had evaporated out, so you will have nice clear ice cubes without cracks from the trapped gasses -

A:
You find an empty ice cube tray