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:
The answer is D. wet and warm.
Explanation:
Just took the unit test. And on page 245 in the text stating summers warm and rainfall occurs year round.
Answer:
sovereignty
Explanation: with sovereignty, a state can rule itself and can govern how they see fit.
The invention of the vapor machine
Answer:
a,b,c are correct... take for example Indus valley civilization
