Questions

A vector quantity is a quantity which has both magnitude and direction. Here in the given options, speed is a scalar quantity but not the vector quantity.

Crop rotation is the technique of planting crops in a different area of the garden so that no single crop will be planted in the same place two—or more—years in a row.

Crop rotation helps to maintain soil structure and nutrient levels and to prevent soilborne pests from getting a foothold in the garden.

The ancient Greek word “bárbaros,” from which it derives, meant “babbler,”.In the Greek ear, speakers of a foreign tongue made unintelligible sounds (“bar bar bar”). Similar words exist in other Indo-European languages, including the Sanskrit “barbara,” which means “stammering.”The word “barbarian” originated in ancient Greece and was initially used to describe all non-Greek-speaking peoples, including Persians, Egyptians, Medes and Phoenicians.

All   are   correct   except   4   as   a cloudburst  can  occur  anytime  and at  any  place  which  is  affected  by convective weather system.