IX. Correct the mistakes where it is necessary

Gyroscope is a valuable instrument for navigation. Due its high degree 1_____ of gyroscopic inertia, resists changes in orientation, and thus can guide 2_____ a ship toward its destination. Gyroscopes, rather magnets, are often the key 3_____ element in a compass. A magnet points to magnetic north, some distance 4____ "true north" (that is, the North Pole.) But with a gyroscope whose axle been 5____ aligned with true north before the flywheel is set spinning, it possible to 6 _____ possess a much more accurate directional indicator. This reason, gyroscopes 7____ are used on airplanes-particularly those flying over the poles—as well 8_____ submarines and even the Space Shuttle. The first known gyroscope built in 9_____ 1810 by Bohnenberger.

Ex. IX

Gyroscope is a valuable instrument for navigation. Due to its high degree of gyroscopic inertia, it resists changes in orientation, and thus can guide a ship toward its destination. Gyroscopes, rather than magnets, are often the key element in a compass. A magnet will point to magnetic north, some distance from "true north" (that is, the North Pole.) But with a gyroscope whose axle has been aligned with true north before the flywheel is set spinning, it is possible to possess a much more accurate directional indicator. For this reason, gyroscopes are used on airplanes—particularly those flying over the poles—as well as submarines and even the Space Shuttle. The first known gyroscope was built in 1810 by Bohnenberger.