Q: - The sound waves hit an object - Echoes are produced - The echo returns to the bat's ears - The bat hears the echo - The bat can figure out where the object is located. What might be the first step of the process?
A: The bat sends out sound waves from their mouth or nose

Q: - The water comes into contact with the rock below - The rock over the years carves through the rock - The space in the rock becomes larger and forms into a cave - As more rather rushes through the cave becomes a cavern. What might be the first step of the process?
A: Water from the surface seeps below the soil

Q: - The oxygen travels to the lungs through the windpipe - The air sacs in the lungs send the oxygen into the blood stream - The carbon dioxide in the blood stream is transferred to the air sacs - The lungs expel through the nose or mouth back into the environment. What might be the first step of the process?
A: You breathe oxygen into your body through the nose or mouth

Q: - 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 - What might be the first step of the process?
A:
The saliva breaks down the chemicals in the food a bit, which helps make the food mushy and easy to swallow