How Much Do Diamond Engagement Rings Cost. There are two major factors which contribute to the cost of a diamond: a ratings system called the âFour Csâ and whether or not the diamond is ASG/GIA certified. The Four Cs refers to the diamondâs color, cut, clarity, and carat size.
Best Answer: A wind vane is used to tell wind direction. The National Weather Service and those that have a lot of money use a Aerovane. Aerovanes are commonly used at many weather stations and airports to measure both wind direction and speed.
Try this! Measuring the direction of winds is not hard, even for local winds. Blowing bubbles can easily give you a hint on the direction of the wind. Wind measurement Winds come in all directions or speeds. They are measured by their directions and speeds.