What unit would I used to measure two towns?

What type of gas builds in blood? What altitude there will be a change in the direction of blood flow? What do you call a person who studies rock's mineral's and earth's land forms? Which characteristic of life does fire have? What polyhedral shapes occur in crystals? How many electron carriers are made in the Krebs cycle? What is collagen classified as? Which property is shared by gemstones such as diamonds rubies sapphire emeralds and topaz? Is magma the result of rocks being heated into liquid rock? Why is the original function of Chester no longer important? How far is Sicily from the equator? Which term is defined as the breaking down of rocks caused by a change in a mineral within the rock due to water oxygen or acid? What combines with hydrogen ions during aerobic cellular respiration? Is a wooden spoon a compound or a mixture or a element? What is the planet move across the sky around the sun through a certain band of constellations are called? What endocrine gland develops from the sympathetic nervous system? What Asian country is found at latitude 50N and longitude 45 E? How does the light from a flashlight that is shone fromtwo different distances model the apparent magnitude of two stars with the same absolute magnitude? Name the cell organelle which function both a a passage way for intracellular transport and as a manufacturing surface? What is a animal that starts with z?