Problem: What is the missing first step of the following process: - Slide out the bottom rack - Take a dirty plate - Rinse the plate - Place the dish in the rack - Repeat leaving enough space for water to reach all items - Fill the soap cup - Turn on the dishwasher.

A: Open the Dishwasher

Problem: What is the missing first step of the following process: - The oxygen travels into the lungs - The oxygen binds to hemoglobin proteins within erythrocytes (red blood cells) - The erythrocytes are pumped through the body by the heart - All cells receive the oxygen.

A: Oxygen enters the body through the mouth or nose

Problem: What is the missing first step of the following process: - These pores are called stomata - Water is absorbed by the roots and passes through vessels in the stem on its way to the leaves - Chlorophyll absorbs the sun's energy - It is this energy that is used to split water molecules into hydrogen and oxygen - Oxygen is released from the leaves into the atmosphere - Hydrogen and carbon dioxide are used to form glucose or food for plants.

A: Carbon dioxide from the air passes through small pores (holes) in the leaves

Problem: 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.

A:
The consumer throws aluminum cans and foil into a recycle bin