In which century did columbus first sail into the western hemisphere?

How many tributaries does the nile river have?

What type of wave borders visible light at the red end of its range?

Volcanic eruptions affect many populated areas. Which of the following pieces of evidence would a geologists use to predict future eruptions?

Europeans would have called Iran by which of the following names in 1500 CE? A. Iraq B. Iran C. Persia D. the Holy Land

Who played an important role in the spread of Spanish settlements throughout the U. S.? A) priests B) Spanish sailors C) Spanish viceroys

Tijuana and Mexicali: (A) are planning to participate in the maquiladora program. (B) are located just opposite the U. S. city of El Paso. (C) were among the first border cites to experience a growth surge. (D) are key cities in the south of Mexico.

Why are there so many diseases in the more impoverished nations in the world

Explain what could be the cause of so many diverse cultures developing in europe?

Describe the landscape of the moon and the events that occurred to create this landscape. What is believed to be true of the far side of the moon and why?

Which Cold War event occurred last