In what russian city did an apparent terrorist attack take place in a subway on tuesday?

What is the "great pacific garbage patch"? (a) a large area of marine debris concentrated by rotating ocean currents (b) a large area around the pacific rim where debris collects from natural disasters such as tsunamis (c) an area in the pacific ocean where trash is intentionally dumped due to lack of landfill availability (d) a large trash dump located in hawaii

Which feature of a map shows the relationship between a distance on a map and that distance on earth? key scale grid system compass rose

After railroads, the next revolution of transportation came with the development of (a) automobile (b) telegraph (c) steam engine