Gallons. You buy gasoline by the gallon.
Answer:
Researchers initially built up the geologic time scale by considering rock layers and record fossils around the world. With this data, researchers put in Earth's stone layers in request by relative age. Afterward, radioactive dating decided the supreme age of the divisions in the geologic time scale.
Capillaries have thin walls, only one cell thick, that allow them to effectively perform their function.
