A. A measures the wind direction and an
measures the wind speed.

b. When rising air , it can lead to clouds and precipitation because cool air can hold less
water vapor.

c. Sinking air
causes evaporation of clouds, thus fair weather.

d. Isobars means . Isobars, or lines of equal pressure, may be packed
together indicating
pressure gradient.

e. Pressure gradient is the difference in pressure between high and low pressure areas. The strongest winds
are in areas where the pressure gradient is the .

A. A wind vane measures the wind direction and anemometer measures the wind speed.

B. When rising air cools, it can lead to clouds and precipitation because cool air can hold less water vapor.

C. Sinking air warms and causes evaporation of clouds, thus fair weather

D. Isobars means bars of equal pressure, ‘iso’ meaning ‘equal’ and ‘bar’ representing a unit of pressure, so together isobar means bars of equal pressure. Isobars or lines of equal pressure may be packed together indicating a strong pressure gradient

E. Pressure gradient is the difference in pressure between high and low pressure areas. The strongest winds are in areas where the pressure gradient is the greatest.

Explanation:

A wind vane is an instrument which spins according to the wind direction.  

An anemometer is a meteorological instrument that measures the wind speed, direction and pressure.

Rising air cools while the sinking air warms according to the adiabatic cooling/warming principles. Warm air holds more moisture than cold air.  

Isobars are unique features on a weather map represented by lines connecting areas with equal pressure gradients. According to the pressure gradients, the isobar spacing is arranged.