How many base units are in the SI system ? = 7
The International System of Units is the modern form of the metric system and is the world’s most widely used system of measurement, used in both commerce and science. It comprises a coherent system of units of measurement built on seven base units.
Meter – Kilogram – Second – Ampere – Kelvin – Candela – Mole
12 Lunar Cycles in a Year
Sumerians invented the calendars. Sumeria was one of the ancient civilizations and historical regions in southern Mesopotamia, modern-day southern Iraq, during the Chalcolithic and Early Bronze Age.
Antarctic Desert, Antarctica ———————————– Arctic Desert, Arctic
Sahara Desert, Africa
Arabian Desert, Middle East ——————————— Gobi Desert, Asia
Kalahari Desert, Africa —————————– Patagonian Desert, South America
Great Victoria Desert, Australia
Syrian Desert, Middle East —————————– Great Basin Desert, North America