Land is a valuable, natural resource in South America. How has 40% of the land being covered by tropical rainforests
affected the way humans interact with their environment in South America?

Which of the following statements best explains why there tends to be a greater number of large cities in southern africa than the east africa

Which of the following terms describes the layers of air surrounding the earth ?

[ou.01jthe greatest speed with which any physical object moves is 300,000 km/soundsec. which of the following has a speed of 300,000 km/sec? a.light in water b.light in vacuum c.sound in air. d. sound in water