14. Weathering and erosion occur when which two Earth system spheres interact?
a. geosphere and biosphere
b. atmosphere and hydrosphere
c. biosphere and atmosphere
d. geosphere and atmosphere

Nike lives in an area that has a south-facing slope. the temperature in his area is always high. which of these abiotic factors is responsible for high temperatures in nike’s area? a. nutrients b. soil c. water d. topography

According to the united nations refugee agency, more than 2/3 of the world's refugees come from just five countries. which country is not on that list? a) turkey b) myanmar c) afghanistan d) south sudan

Mexico city is an example of how humans alter their environment because it was a. one of the world’s largest cities b. built on drained and filled lake beds c. built after conquest by the spanish d. once the capital of the aztec empire