Between 1865-1869, 10,000 -12,000 Chinese were involved in the building of the western leg of the Central Pacific Railroad. The work was backbreaking and highly dangerous. Approximately 1,200 died while building the Transcontinental Railroad. Over a thousand Chinese had their bones shipped back to China to be buried. How many died building railroads? While canal … Read more
Carbon monoxide alarms are the most effective way to detect carbon monoxide in the air and alert you to the presence of the dangerous gas. Carbon monoxide consists of one part oxygen and one part carbon and is produced by partially burned carbon fuel sources like natural gas, coal, petrol, wood and propane. What can … Read more
How do you calculate absolute dating? Absolute dating methods determine the amount of time that has passed since rocks formed by measuring the radioactive decay of isotopes or the effects of radiation on the crystalline structure of minerals. Paleomagnetism measures the ancient direction of the Earth’s magnetic field to help determine the age of rocks. … Read more
What is the sympathetic and parasympathetic nervous system? The sympathetic division initiates the fight-or-flight response and the parasympathetic initiates the rest-and-digest or feed-and-breed responses. The sympathetic and parasympathetic nervous systems are important for modulating many vital functions, including respiration and cardiac contractility. What is the function of the parasympathetic and sympathetic nervous system? The sympathetic system … Read more
What kind of animals are there in the Appalachian Mountains? How many types of animals live in the Appalachian Mountains? In terms of the number of species, the Appalachian Mountains are among the richest in the temperate regions. They include 255 birds, 78 mammals, 58 reptiles, and 76 amphibians. What plants and animals live in … Read more
