Solution:
It actually takes the Earth slightly over 23 hours and 56 minutes to rotate once around this axis.

Solution:
The Rhine is one of the longest and most important river in Europe. It runs for over 1,232 km (766 mi) from its source in the in the Swiss Alps (in Switzerland), issuing from the Rheinwaldhorn Glacier 3,353 m above sea level.

Solution:
East Asia, Southern Asia, North Western Europe are regarded as areas of high density of population.

Solution:
The famous matterhorn peak is found in Switzerland. Matterhorn mountain is situated in the Pennine Alps on the border between Switzerland and Italy is one of the most famous and distinctive of all Alpine peaks.

Solution:
The correct descending order of the leading producers of milk is India, U.S.A., China and Russia.

Solution:
The smallest country in South America is Surinam. Suriname, country located on the northern coast of South America. Suriname is one of the smallest countries in South America, yet its population is one of the most ethnically diverse in the region.

Solution:
Quartzite is metamorphosed from Sandstone. Quartzite is a nonfoliated metamorphic rock composed almost entirely of quartz. It forms when a quartz-rich sandstone is altered by the heat, pressure, and chemical activity of metamorphism. These conditions recrystallize the sand grains and the silica cement that binds them together.