Answer:
These were the people the European explorers met when their ships landed in America. Europeans were used to these diseases, but Indian people had no resistance to them. Sometimes the illnesses spread through direct contact with colonists. Other times, they were transmitted as Indians traded with one another.
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Oral rehydration salts are used to prevent and treat dehydration, especially that due to diarrhea.
Answer:
Because of their wave movement, P waves travel through any kind of material, whether it is a solid, liquid or gas. On the other hand, S waves only move through solids and are stopped by liquids and gases. ... This also accounts why fewer S waves are recorded than P waves.
Major volcanic events that have occurred within the Ring of Fire since 1800 included the eruptions of Mount Tambora (1815), Krakatoa (1883), Novarupta (1912), Mount Saint Helens (1980), Mount Ruiz (1985), and Mount Pinatubo (1991).
