Problem: - The fire surrounds the vicinity - The animals are trapped - Those that survive have their habitat destroyed - The survivors must find a new habitat - Conflict with other animals occur. What might be the first step of the process?

A: A forest fire starts

Problem: - The gases come to a head and push molten magma to the surface - The magma cools - With enough time the pressure builds up greatly - The resulting volcano may explode. What might be the first step of the process?

A: Gases cause pressure beneath the earth

Problem: - 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. What might be the first step of the process?

A: Oxygen enters the body through the mouth or nose

Problem: - The pancreas creates juices that help digest food - The pancreas releases the juices into the stomach - Trypsin and chymotrypsin digest protein - Insulin is produced to move glucose from the blood - The enzymes begin producing again. What might be the first step of the process?

A:
The pancreas detects chemical changes in the stomach