The hemoglobin test is often used to check for anemia, usually along with a hematocrit or as part of a complete blood count (CBC) . The test may be used to screen for, diagnose, or monitor a number of conditions and diseases that affect red blood cells (RBCs) and/or the amount of hemoglobin in blood.he hemoglobin test is often used to check for anemia, usually along with a hematocrit or as part of a complete blood count (CBC) . The test may be used to screen for, diagnose, or monitor a number of conditions and diseases that affect red blood cells (RBCs) and/or the amount of hemoglobin in blood.
Volcanoes form at hot spots in the Earth's crust, at convergent plate boundaries where subduction of oceanic crust is occurring, and at divergent plate boundaries where gaps i â¦ n the crust are being infilled with rising magma.
Earthquakes and Volcanoes Key Concept What causes volcanoes to form? Directions: Use the diagram to answer each question on the lines provided. 1. Why does magma move upward? 2. What happens when magma erupts on the surface? 3. What is a volcano? 4. Where do volcanoes form? 5. How is the mid-ocean ridge shown in the diagram formed? 6. How does low pressure cause volcanoes to form? 7.