Answer:
Dendrochronologists study tree rings to learn about past climates. Trees in temperate areas form one growth ring per year. Scientists can look at the rings and identify climate conditions during each year of the tree’s life. Scientists found long droughts in both the twelfth and thirteenth centuries. This is the same period when the Anasazi were leaving Chaco Canyon. Under normal conditions it was hard to support their villages in the harsh environment of northern New Mexico. When years of drought occurred, the densely populated Anasazi pueblos could no longer raise enough food. Other forces could have pushed the Anasazi away from Chaco as well.
Explanation:
Answer:
20
Explanation:
A. Wrong subject
B. 4 x 5 is 20, and if you do all the multiples before that, you would get a common one.
4 8 12 16 20
5 10 15 20
Answer: Science
The Enlightenment is the name of a period of European history, roughly beginning in the 17th or 18th century. One of the most significant events in this period was the scientific revolution.
The scientific revolution was a series of events that marked the beginning of modern science. This time period saw the development of the scientific method and the categorization of different sciences, along with more specialized methods of addressing each one of these branches. It also brought a general trust in science and reason as methods to arrive to answers, and to guide society into modernity.
Answer:
Serbia
Explanation:
Austria-Hungary declares war on Serbia. On July 28, 1914, one month to the day after Archduke Franz Ferdinand of Austria and his wife were killed by a Serbian nationalist in Sarajevo, Austria-Hungary declares war on Serbia, effectively beginning the First World War
