Final answer:
Ice core samples, tree rings, and maps are sources of evidence for climate changes and conditions that affected early societies.
Step-by-step explanation:
Evidence of climate changes and conditions that affected early societies can be gathered from a variety of sources. Some of these sources include:
- Ice core samples: Scientists analyze ice cores from glaciers and ice sheets to study past climates and atmospheric conditions. The ice contains trapped air bubbles and other substances that provide information about temperature and greenhouse gas levels in the past.
- Tree rings: By studying the growth rings of trees, scientists can infer past climate conditions, such as precipitation levels and temperature variations.
- Maps: Historical maps can provide valuable information about past climates, including temperature ranges and precipitation patterns.