What is the missing first step of the following process: - Your tongue helps out, pushing the food around while you chew with your teeth - The esophagus moves food from the back of your throat to your stomach - Strong muscles in the walls of the stomach and gastric juices break down food in your stomach - Your stomach moves the food into the intestines to complete digestion -
Ans: The saliva breaks down the chemicals in the food a bit, which helps make the food mushy and easy to swallow

What is the missing first step of the following process: - The parent(s) incubate the eggs - The eggs hatch - The mother (and sometimes the father) bird take care of the baby birds - The baby birds grow up and get their flight feathers - The young birds learn to fly and leave the nest - The adult birds find mates and mate.
Ans: A bird lays eggs in a nest

What is the missing first step of the following process: - The can is taken to a recycling center - Melted down along with other cans - The melted metal is turned into bars - Becomes material for other products.
Ans: A can is thrown away into a recycling bin

What is the missing first step of the following process: - Rain picks up carbon dioxide as it falls to earth - The rain falls on the soil over the limestone - The carbon dioxide in the rain washes through the soil - The carbon dioxide turns into acid - The acid in the rain gets to the limestone below the soil - The acid dissolves the limestone - Acid continues to erode the limestone with more rain over time - The eroded limestone sometimes forms caves.
Ans: Limestone is located under the soil